Ehcache.java
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net.sf.ehcache |
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ehcache |
View: Reasons, Metrics, Source Code
These are the metrics that contribute to the Enerjy Score for this file, ranked by impact. So the metrics listed at the top influence the score to a greater extent that the metrics listed at the bottom.
| Metric | Description | |
|---|---|---|
| DOC_COMMENT | Number of javadoc comment lines |  |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| COMMENTS | Comment lines | |
| DECL_COMMENTS | Comments in declarations | |
| FUNCTIONS | Number of function declarations | |
| SIZE | Size of the file in bytes | |
| JAVA0115 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0144 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| LINES | Number of lines in the source file | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| JAVA0141 | JAVA0141 Unnecessary modifier for method in interface | |
| PARAMS | Number of formal parameter declarations | |
| JAVA0132 | JAVA0132 Method overload with compatible signature | |
| CYCLOMATIC | Cyclomatic complexity | |
| COMMENT_DENSITY | Comment density | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0136 | JAVA0136 N methods defined in class (maximum: M) | |
| EXEC_COMMENTS | Comments in executable code | |
| LINE_COMMENT | Number of line comments | |
| COMPARISONS | Number of comparison operators | |
| LOC | Lines of code | |
| BLOCKS | Number of blocks | |
| RETURNS | Number of return points from functions | |
| ELOC | Effective lines of code | |
| OPERATORS | Number of operators | |
| LOOPS | Number of loops | |
| EXITS | Procedure exits | |
| PROGRAM_LENGTH | Halstead program length | |
| OPERANDS | Number of operands | |
| UNIQUE_OPERATORS | Number of unique operators | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
/**
* Copyright 2003-2008 Luck Consulting Pty Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.sf.ehcache;
import net.sf.ehcache.event.RegisteredEventListeners;
import net.sf.ehcache.store.MemoryStoreEvictionPolicy;
import net.sf.ehcache.bootstrap.BootstrapCacheLoader;
import net.sf.ehcache.config.CacheConfiguration;
import net.sf.ehcache.extension.CacheExtension;
import net.sf.ehcache.exceptionhandler.CacheExceptionHandler;
import net.sf.ehcache.loader.CacheLoader;
import java.io.Serializable;
import java.util.List;
import java.util.Map;
import java.util.Collection;
/**
* An interface for Ehcache.
* <p/>
* Ehcache is the central interface. Caches have {@link Element}s and are managed
* by the {@link CacheManager}. The Cache performs logical actions. It delegates physical
* implementations to its {@link net.sf.ehcache.store.Store}s.
* <p/>
* A reference to an EhCache can be obtained through the {@link CacheManager}. An Ehcache thus obtained
* is guaranteed to have status {@link Status#STATUS_ALIVE}. This status is checked for any method which
* throws {@link IllegalStateException} and the same thrown if it is not alive. This would normally
* happen if a call is made after {@link CacheManager#shutdown} is invoked.
* <p/>
* Statistics on cache usage are collected and made available through public methods.
*
* @author Greg Luck
* @version $Id: Ehcache.java 744 2008-08-16 20:10:49Z gregluck $
*/
public interface Ehcache extends Cloneable {
/**
* Put an element in the cache.
* <p/>
* Resets the access statistics on the element, which would be the case if it has previously been
* gotten from a cache, and is now being put back.
* <p/>
* Also notifies the CacheEventListener that:
* <ul>
* <li>the element was put, but only if the Element was actually put.
* <li>if the element exists in the cache, that an update has occurred, even if the element would be expired
* if it was requested
* </ul>
*
* @param element An object. If Serializable it can fully participate in replication and the DiskStore.
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
* @throws IllegalArgumentException if the element is null
* @throws CacheException
*/
void put(Element element) throws IllegalArgumentException, IllegalStateException,
CacheException;
/**
* Put an element in the cache.
* <p/>
* Resets the access statistics on the element, which would be the case if it has previously been
* gotten from a cache, and is now being put back.
* <p/>
* Also notifies the CacheEventListener that:
* <ul>
* <li>the element was put, but only if the Element was actually put.
* <li>if the element exists in the cache, that an update has occurred, even if the element would be expired
* if it was requested
* </ul>
*
* @param element An object. If Serializable it can fully participate in replication and the DiskStore.
* @param doNotNotifyCacheReplicators whether the put is coming from a doNotNotifyCacheReplicators cache peer, in which case this put should not initiate a
* further notification to doNotNotifyCacheReplicators cache peers
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
* @throws IllegalArgumentException if the element is null
*/
void put(Element element, boolean doNotNotifyCacheReplicators) throws IllegalArgumentException,
IllegalStateException,
CacheException;
/**
* Put an element in the cache, without updating statistics, or updating listeners. This is meant to be used
* in conjunction with {@link #getQuiet}
*
* @param element An object. If Serializable it can fully participate in replication and the DiskStore.
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
* @throws IllegalArgumentException if the element is null
*/
void putQuiet(Element element) throws IllegalArgumentException, IllegalStateException,
CacheException;
/**
* Gets an element from the cache. Updates Element Statistics
* <p/>
* Note that the Element's lastAccessTime is always the time of this get.
* Use {@link #getQuiet(Object)} to peak into the Element to see its last access time with get
*
* @param key a serializable value
* @return the element, or null, if it does not exist.
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
* @see #isExpired
*/
Element get(Serializable key) throws IllegalStateException, CacheException;
/**
* Gets an element from the cache. Updates Element Statistics
* <p/>
* Note that the Element's lastAccessTime is always the time of this get.
* Use {@link #getQuiet(Object)} to peak into the Element to see its last access time with get
*
* @param key an Object value
* @return the element, or null, if it does not exist.
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
* @see #isExpired
* @since 1.2
*/
Element get(Object key) throws IllegalStateException, CacheException;
/**
* Gets an element from the cache, without updating Element statistics. Cache statistics are
* still updated.
* <p/>
*
* @param key a serializable value
* @return the element, or null, if it does not exist.
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
* @see #isExpired
*/
Element getQuiet(Serializable key) throws IllegalStateException, CacheException;
/**
* Gets an element from the cache, without updating Element statistics. Cache statistics are
* also not updated.
* <p/>
*
* @param key a serializable value
* @return the element, or null, if it does not exist.
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
* @see #isExpired
* @since 1.2
*/
Element getQuiet(Object key) throws IllegalStateException, CacheException;
/**
* Returns a list of all elements in the cache, whether or not they are expired.
* <p/>
* The returned keys are unique and can be considered a set.
* <p/>
* The List returned is not live. It is a copy.
* <p/>
* The time taken is O(n). On a single cpu 1.8Ghz P4, approximately 8ms is required
* for each 1000 entries.
*
* @return a list of {@link Object} keys
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
*/
List getKeys() throws IllegalStateException, CacheException;
/**
* Returns a list of all elements in the cache. Only keys of non-expired
* elements are returned.
* <p/>
* The returned keys are unique and can be considered a set.
* <p/>
* The List returned is not live. It is a copy.
* <p/>
* The time taken is O(n), where n is the number of elements in the cache. On
* a 1.8Ghz P4, the time taken is approximately 200ms per 1000 entries. This method
* is not synchronized, because it relies on a non-live list returned from {@link #getKeys()}
* , which is synchronised, and which takes 8ms per 1000 entries. This way
* cache liveness is preserved, even if this method is very slow to return.
* <p/>
* Consider whether your usage requires checking for expired keys. Because
* this method takes so long, depending on cache settings, the list could be
* quite out of date by the time you get it.
*
* @return a list of {@link Object} keys
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
*/
List getKeysWithExpiryCheck() throws IllegalStateException, CacheException;
/**
* Returns a list of all elements in the cache, whether or not they are expired.
* <p/>
* The returned keys are not unique and may contain duplicates. If the cache is only
* using the memory store, the list will be unique. If the disk store is being used
* as well, it will likely contain duplicates, because of the internal store design.
* <p/>
* The List returned is not live. It is a copy.
* <p/>
* The time taken is O(log n). On a single cpu 1.8Ghz P4, approximately 6ms is required
* for 1000 entries and 36 for 50000.
* <p/>
* This is the fastest getKeys method
*
* @return a list of {@link Object} keys
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
*/
List getKeysNoDuplicateCheck() throws IllegalStateException;
/**
* Removes an {@link net.sf.ehcache.Element} from the Cache. This also removes it from any
* stores it may be in.
* <p/>
* Also notifies the CacheEventListener after the element was removed.
*
* @param key
* @return true if the element was removed, false if it was not found in the cache
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
*/
boolean remove(Serializable key) throws IllegalStateException;
/**
* Removes an {@link net.sf.ehcache.Element} from the Cache. This also removes it from any
* stores it may be in.
* <p/>
* Also notifies the CacheEventListener after the element was removed, but only if an Element
* with the key actually existed.
*
* @param key
* @return true if the element was removed, false if it was not found in the cache
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
* @since 1.2
*/
boolean remove(Object key) throws IllegalStateException;
/**
* Removes an {@link net.sf.ehcache.Element} from the Cache. This also removes it from any
* stores it may be in.
* <p/>
* Also notifies the CacheEventListener after the element was removed, but only if an Element
* with the key actually existed.
*
* @param key
* @param doNotNotifyCacheReplicators whether the put is coming from a doNotNotifyCacheReplicators cache peer, in which case this put should not initiate a
* further notification to doNotNotifyCacheReplicators cache peers
* @return true if the element was removed, false if it was not found in the cache
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
*/
boolean remove(Serializable key, boolean doNotNotifyCacheReplicators) throws IllegalStateException;
/**
* Removes an {@link net.sf.ehcache.Element} from the Cache. This also removes it from any
* stores it may be in.
* <p/>
* Also notifies the CacheEventListener after the element was removed, but only if an Element
* with the key actually existed.
*
* @param key
* @param doNotNotifyCacheReplicators whether the put is coming from a doNotNotifyCacheReplicators cache peer, in which case this put should not initiate a
* further notification to doNotNotifyCacheReplicators cache peers
* @return true if the element was removed, false if it was not found in the cache
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
*/
boolean remove(Object key, boolean doNotNotifyCacheReplicators) throws IllegalStateException;
/**
* Removes an {@link net.sf.ehcache.Element} from the Cache, without notifying listeners. This also removes it from any
* stores it may be in.
* <p/>
*
* @param key
* @return true if the element was removed, false if it was not found in the cache
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
*/
boolean removeQuiet(Serializable key) throws IllegalStateException;
/**
* Removes an {@link net.sf.ehcache.Element} from the Cache, without notifying listeners. This also removes it from any
* stores it may be in.
* <p/>
*
* @param key
* @return true if the element was removed, false if it was not found in the cache
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
* @since 1.2
*/
boolean removeQuiet(Object key) throws IllegalStateException;
/**
* Removes all cached items.
*
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
*/
void removeAll() throws IllegalStateException, CacheException;
/**
* Removes all cached items.
*
* @param doNotNotifyCacheReplicators whether the put is coming from a doNotNotifyCacheReplicators cache peer,
* in which case this put should not initiate a further notification to doNotNotifyCacheReplicators cache peers
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
*/
void removeAll(boolean doNotNotifyCacheReplicators) throws IllegalStateException, CacheException;
/**
* Flushes all cache items from memory to the disk store, and from the DiskStore to disk.
*
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
*/
void flush() throws IllegalStateException, CacheException;
/**
* Gets the size of the cache. This is a subtle concept. See below.
* <p/>
* The size is the number of {@link net.sf.ehcache.Element}s in the {@link net.sf.ehcache.store.MemoryStore} plus
* the number of {@link net.sf.ehcache.Element}s in the {@link net.sf.ehcache.store.DiskStore}.
* <p/>
* This number is the actual number of elements, including expired elements that have
* not been removed.
* <p/>
* Expired elements are removed from the the memory store when
* getting an expired element, or when attempting to spool an expired element to
* disk.
* <p/>
* Expired elements are removed from the disk store when getting an expired element,
* or when the expiry thread runs, which is once every five minutes.
* <p/>
* To get an exact size, which would exclude expired elements, use {@link #getKeysWithExpiryCheck()}.size(),
* although see that method for the approximate time that would take.
* <p/>
* To get a very fast result, use {@link #getKeysNoDuplicateCheck()}.size(). If the disk store
* is being used, there will be some duplicates.
*
* @return The size value
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
*/
int getSize() throws IllegalStateException, CacheException;
/**
* Gets the size of the memory store for this cache
* <p/>
* Warning: This method can be very expensive to run. Allow approximately 1 second
* per 1MB of entries. Running this method could create liveness problems
* because the object lock is held for a long period
* <p/>
*
* @return the approximate size of the memory store in bytes
* @throws IllegalStateException
*/
long calculateInMemorySize() throws IllegalStateException, CacheException;
/**
* Returns the number of elements in the memory store.
*
* @return the number of elements in the memory store
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
*/
long getMemoryStoreSize() throws IllegalStateException;
/**
* Returns the number of elements in the disk store.
*
* @return the number of elements in the disk store.
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
*/
int getDiskStoreSize() throws IllegalStateException;
/**
* Gets the status attribute of the Cache.
*
* @return The status value from the Status enum class
*/
Status getStatus();
/**
* Gets the cache name.
*/
String getName();
/**
* Sets the cache name which will name.
*
* @param name the name of the cache. Should not be null.
*/
void setName(String name);
/**
* Gets timeToIdleSeconds.
*/
long getTimeToIdleSeconds();
/**
* Gets timeToLiveSeconds.
*/
long getTimeToLiveSeconds();
/**
* Are elements eternal.
*/
boolean isEternal();
/**
* Does the overflow go to disk.
*/
boolean isOverflowToDisk();
/**
* Gets the maximum number of elements to hold in memory.
*/
int getMaxElementsInMemory();
/**
* Gets the maximum number of elements to hold on Disk.
*/
int getMaxElementsOnDisk();
/**
* The policy used to evict elements from the {@link net.sf.ehcache.store.MemoryStore}.
* This can be one of:
* <ol>
* <li>LRU - least recently used
* <li>LFU - least frequently used
* <li>FIFO - first in first out, the oldest element by creation time
* </ol>
* The default value is LRU
*
* @since 1.2
*/
MemoryStoreEvictionPolicy getMemoryStoreEvictionPolicy();
/**
* Returns a {@link String} representation of {@link net.sf.ehcache.Cache}.
*/
String toString();
/**
* Checks whether this cache element has expired.
* <p/>
* The element is expired if:
* <ol>
* <li> the idle time is non-zero and has elapsed, unless the cache is eternal; or
* <li> the time to live is non-zero and has elapsed, unless the cache is eternal; or
* <li> the value of the element is null.
* </ol>
*
* @param element the element to check
* @return true if it has expired
* @throws IllegalStateException if the cache is not {@link net.sf.ehcache.Status#STATUS_ALIVE}
* @throws NullPointerException if the element is null
*/
boolean isExpired(Element element) throws IllegalStateException, NullPointerException;
/**
* Clones a cache. This is only legal if the cache has not been
* initialized. At that point only primitives have been set and no
* {@link net.sf.ehcache.store.MemoryStore} or {@link net.sf.ehcache.store.DiskStore} has been created.
* <p/>
* A new, empty, RegisteredEventListeners is created on clone.
* <p/>
*
* @return an object of type {@link net.sf.ehcache.Cache}
* @throws CloneNotSupportedException
*/
Object clone() throws CloneNotSupportedException;
/**
* @return true if the cache overflows to disk and the disk is persistent between restarts
*/
boolean isDiskPersistent();
/**
* @return the interval between runs
* of the expiry thread, where it checks the disk store for expired elements. It is not the
* the timeToLiveSeconds.
*/
long getDiskExpiryThreadIntervalSeconds();
/**
* Use this to access the service in order to register and unregister listeners
*
* @return the RegisteredEventListeners instance for this cache.
*/
RegisteredEventListeners getCacheEventNotificationService();
/**
* Whether an Element is stored in the cache in Memory, indicating a very low cost of retrieval.
*
* @return true if an element matching the key is found in memory
*/
boolean isElementInMemory(Serializable key);
/**
* Whether an Element is stored in the cache in Memory, indicating a very low cost of retrieval.
*
* @return true if an element matching the key is found in memory
* @since 1.2
*/
boolean isElementInMemory(Object key);
/**
* Whether an Element is stored in the cache on Disk, indicating a higher cost of retrieval.
*
* @return true if an element matching the key is found in the diskStore
*/
boolean isElementOnDisk(Serializable key);
/**
* Whether an Element is stored in the cache on Disk, indicating a higher cost of retrieval.
*
* @return true if an element matching the key is found in the diskStore
* @since 1.2
*/
boolean isElementOnDisk(Object key);
/**
* The GUID for this cache instance can be used to determine whether two cache instance references
* are pointing to the same cache.
*
* @return the globally unique identifier for this cache instance. This is guaranteed to be unique.
* @since 1.2
*/
String getGuid();
/**
* Gets the CacheManager managing this cache. For a newly created cache this will be null until
* it has been added to a CacheManager.
*
* @return the manager or null if there is none
*/
CacheManager getCacheManager();
/**
* Resets statistics counters back to 0.
*/
void clearStatistics();
/**
* Accurately measuring statistics can be expensive. Returns the current accuracy setting.
*
* @return one of {@link Statistics#STATISTICS_ACCURACY_BEST_EFFORT}, {@link Statistics#STATISTICS_ACCURACY_GUARANTEED}, {@link Statistics#STATISTICS_ACCURACY_NONE}
*/
public int getStatisticsAccuracy();
/**
* Sets the statistics accuracy.
*
* @param statisticsAccuracy one of {@link Statistics#STATISTICS_ACCURACY_BEST_EFFORT}, {@link Statistics#STATISTICS_ACCURACY_GUARANTEED}, {@link Statistics#STATISTICS_ACCURACY_NONE}
*/
public void setStatisticsAccuracy(int statisticsAccuracy);
/**
* Causes all elements stored in the Cache to be synchronously checked for expiry, and if expired, evicted.
*/
void evictExpiredElements();
/**
* An inexpensive check to see if the key exists in the cache.
*
* @param key the key to check for
* @return true if an Element matching the key is found in the cache. No assertions are made about the state of the Element.
*/
boolean isKeyInCache(Object key);
/**
* An extremely expensive check to see if the value exists in the cache.
*
* @param value to check for
* @return true if an Element matching the key is found in the cache. No assertions are made about the state of the Element.
*/
boolean isValueInCache(Object value);
/**
* Gets an immutable Statistics object representing the Cache statistics at the time. How the statistics are calculated
* depends on the statistics accuracy setting. The only aspect of statistics sensitive to the accuracy setting is
* object size. How that is calculated is discussed below.
* <h3>Best Effort Size</h3>
* This result is returned when the statistics accuracy setting is {@link Statistics#STATISTICS_ACCURACY_BEST_EFFORT}.
* <p/>
* The size is the number of {@link Element}s in the {@link net.sf.ehcache.store.MemoryStore} plus
* the number of {@link Element}s in the {@link net.sf.ehcache.store.DiskStore}.
* <p/>
* This number is the actual number of elements, including expired elements that have
* not been removed. Any duplicates between stores are accounted for.
* <p/>
* Expired elements are removed from the the memory store when
* getting an expired element, or when attempting to spool an expired element to
* disk.
* <p/>
* Expired elements are removed from the disk store when getting an expired element,
* or when the expiry thread runs, which is once every five minutes.
* <p/>
* <h3>Guaranteed Accuracy Size</h3>
* This result is returned when the statistics accuracy setting is {@link Statistics#STATISTICS_ACCURACY_GUARANTEED}.
* <p/>
* This method accounts for elements which might be expired or duplicated between stores. It take approximately
* 200ms per 1000 elements to execute.
* <h3>Fast but non-accurate Size</h3>
* This result is returned when the statistics accuracy setting is {@link Statistics#STATISTICS_ACCURACY_NONE}.
* <p/>
* The number given may contain expired elements. In addition if the DiskStore is used it may contain some double
* counting of elements. It takes 6ms for 1000 elements to execute. Time to execute is O(log n). 50,000 elements take
* 36ms.
*
* @return the number of elements in the ehcache, with a varying degree of accuracy, depending on accuracy setting.
* @throws IllegalStateException if the cache is not {@link Status#STATUS_ALIVE}
*/
Statistics getStatistics() throws IllegalStateException;
/**
* Sets the CacheManager
*
* @param cacheManager the CacheManager for this cache to use.
*/
void setCacheManager(CacheManager cacheManager);
/**
* Accessor for the BootstrapCacheLoader associated with this cache. For testing purposes.
*
* @return the BootstrapCacheLoader to use
*/
BootstrapCacheLoader getBootstrapCacheLoader();
/**
* Sets the bootstrap cache loader.
*
* @param bootstrapCacheLoader the loader to be used
* @throws CacheException if this method is called after the cache is initialized
*/
void setBootstrapCacheLoader(BootstrapCacheLoader bootstrapCacheLoader) throws CacheException;
/**
* DiskStore paths can conflict between CacheManager instances. This method allows the path to be changed.
*
* @param diskStorePath the new path to be used.
* @throws CacheException if this method is called after the cache is initialized
*/
void setDiskStorePath(String diskStorePath) throws CacheException;
/**
* Newly created caches do not have a {@link net.sf.ehcache.store.MemoryStore} or a {@link net.sf.ehcache.store.DiskStore}.
* <p/>
* This method creates those and makes the cache ready to accept elements
*/
void initialise();
/**
* Bootstrap command. This must be called after the Cache is intialised, during
* CacheManager initialisation. If loads are synchronous, they will complete before the CacheManager
* initialise completes, otherwise they will happen in the background.
*/
void bootstrap();
/**
* Flushes all cache items from memory to auxilliary caches and close the auxilliary caches.
* <p/>
* Should be invoked only by CacheManager.
*
* @throws IllegalStateException if the cache is not {@link Status#STATUS_ALIVE}
*/
public void dispose() throws IllegalStateException;
/**
* Gets the cache configuration this cache was created with.
* <p/>
* Things like listeners that are added dynamically are excluded.
*/
CacheConfiguration getCacheConfiguration();
/**
* Register a {@link CacheExtension} with the cache. It will then be tied into the cache lifecycle.
* <p/>
* If the CacheExtension is not initialised, initialise it.
*/
public void registerCacheExtension(CacheExtension cacheExtension);
/**
* Unregister a {@link CacheExtension} with the cache. It will then be detached from the cache lifecycle.
*/
public void unregisterCacheExtension(CacheExtension cacheExtension);
/**
* The average get time in ms.
*/
public float getAverageGetTime();
/**
* Sets an ExceptionHandler on the Cache. If one is already set, it is overwritten.
*/
public void setCacheExceptionHandler(CacheExceptionHandler cacheExceptionHandler);
/**
* Sets an ExceptionHandler on the Cache. If one is already set, it is overwritten.
*/
public CacheExceptionHandler getCacheExceptionHandler();
/**
* Setter for the CacheLoader. Changing the CacheLoader takes immediate effect.
*
* @param cacheLoader the loader to dynamically load new cache entries
*/
public void setCacheLoader(CacheLoader cacheLoader);
/**
* Gets the CacheLoader registered in this cache
*
* @return the loader, or null if there is none
*/
public CacheLoader getCacheLoader();
/**
* Warning: This method is related to the JSR107 specification, which is in draft. It is subject to change without notice.
* <p/>
* This method will return, from the cache, the object associated with
* the argument "key".
* <p/>
* If the object is not in the cache, the associated
* cache loader will be called. That is either the CacheLoader passed in, or if null, the one associated with the cache.
* If both are null, no load is performed and null is returned.
* <p/>
* Because this method may take a long time to complete, it is not synchronized. The underlying cache operations
* are synchronized.
*
* @param key key whose associated value is to be returned.
* @param loader the override loader to use. If null, the cache's default loader will be used
* @param loaderArgument an argument to pass to the CacheLoader.
* @return an element if it existed or could be loaded, otherwise null
* @throws CacheException
*/
public Element getWithLoader(Object key, CacheLoader loader, Object loaderArgument) throws CacheException;
/**
* Warning: This method is related to the JSR107 specification, which is in draft. It is subject to change without notice.
* <p/>
* The getAll method will return, from the cache, a Map of the objects associated with the Collection of keys in argument "keys".
* If the objects are not in the cache, the associated cache loader will be called. If no loader is associated with an object,
* a null is returned. If a problem is encountered during the retrieving or loading of the objects, an exception will be thrown.
* If the "arg" argument is set, the arg object will be passed to the CacheLoader.loadAll method. The cache will not dereference
* the object. If no "arg" value is provided a null will be passed to the loadAll method. The storing of null values in the cache
* is permitted, however, the get method will not distinguish returning a null stored in the cache and not finding the object in
* the cache. In both cases a null is returned.
* <p/>
* <p/>
* Note. If the getAll exceeds the maximum cache size, the returned map will necessarily be less than the number specified.
* <p/>
* Because this method may take a long time to complete, it is not synchronized. The underlying cache operations
* are synchronized.
* <p/>
* The constructs package provides similar functionality using the
* decorator {@link net.sf.ehcache.constructs.blocking.SelfPopulatingCache}
* @param keys a collection of keys to be returned/loaded
* @param loaderArgument an argument to pass to the CacheLoader.
* @return a Map populated from the Cache. If there are no elements, an empty Map is returned.
* @throws CacheException
*/
public Map getAllWithLoader(Collection keys, Object loaderArgument) throws CacheException;
/**
* Warning: This method is related to the JSR107 specification, which is in draft. It is subject to change without notice.
* <p/>
* The load method provides a means to "pre load" the cache. This method will, asynchronously, load the specified
* object into the cache using the associated cacheloader. If the object already exists in the cache, no action is
* taken. If no loader is associated with the object, no object will be loaded into the cache. If a problem is
* encountered during the retrieving or loading of the object, an exception should be logged. If the "arg" argument
* is set, the arg object will be passed to the CacheLoader.load method. The cache will not dereference the object.
* If no "arg" value is provided a null will be passed to the load method. The storing of null values in the cache
* is permitted, however, the get method will not distinguish returning a null stored in the cache and not finding
* the object in the cache. In both cases a null is returned.
* <p/>
* The Ehcache native API provides similar functionality to loaders using the
* decorator {@link net.sf.ehcache.constructs.blocking.SelfPopulatingCache}
*
* @param key key whose associated value to be loaded using the associated cacheloader if this cache doesn't contain it.
* @throws CacheException
*/
public void load(final Object key) throws CacheException;
/**
* Warning: This method is related to the JSR107 specification, which is in draft. It is subject to change without notice.
* <p/>
* The loadAll method provides a means to "pre load" objects into the cache. This method will, asynchronously, load
* the specified objects into the cache using the associated cache loader. If the an object already exists in the
* cache, no action is taken. If no loader is associated with the object, no object will be loaded into the cache.
* If a problem is encountered during the retrieving or loading of the objects, an exception (to be defined)
* should be logged. The getAll method will return, from the cache, a Map of the objects associated with the
* Collection of keys in argument "keys". If the objects are not in the cache, the associated cache loader will be
* called. If no loader is associated with an object, a null is returned. If a problem is encountered during the
* retrieving or loading of the objects, an exception (to be defined) will be thrown. If the "arg" argument is set,
* the arg object will be passed to the CacheLoader.loadAll method. The cache will not dereference the object.
* If no "arg" value is provided a null will be passed to the loadAll method.
* <p/>
* keys - collection of the keys whose associated values to be loaded into this cache by using the associated
* cacheloader if this cache doesn't contain them.
* <p/>
* The Ehcache native API provides similar functionality to loaders using the
* decorator {@link net.sf.ehcache.constructs.blocking.SelfPopulatingCache}
*/
public void loadAll(final Collection keys, final Object argument) throws CacheException;
/**
* Whether this cache is disabled. "Disabled" means:
* <ol>
* <li>bootstrap is disabled
* <li>puts are discarded
* <li>putQuites are discarded
* </ol>
* In all other respects the cache continues as it is.
* <p/>
* You can disable and enable a cache programmatically through the {@link #setDisabled(boolean)} method.
* <p/>
* @return true if the cache is disabled.
*/
public boolean isDisabled();
/**
* Disables or enables this cache. This call overrides the previous value of disabled.
* <p/>
* @param disabled true if you wish to disable, false to enable
* @see #isDisabled()
*/
public void setDisabled(boolean disabled);
}
The table below shows all metrics for Ehcache.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 0.00 | Number of blocks | |
| BLOCK_COMMENT | 0.00 | Number of block comment lines | |
| COMMENTS | 658.00 | Comment lines | |
| COMMENT_DENSITY | 7.31 | Comment density | |
| COMPARISONS | 0.00 | Number of comparison operators | |
| CYCLOMATIC | 73.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 75.00 | Comments in declarations | |
| DOC_COMMENT | 658.00 | Number of javadoc comment lines | |
| ELOC | 90.00 | Effective lines of code | |
| EXEC_COMMENTS | 0.00 | Comments in executable code | |
| EXITS | 0.00 | Procedure exits | |
| FUNCTIONS | 73.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 16.92 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 42.00 | Interface complexity | |
| JAVA0001 | 0.00 | JAVA0001 Package name does not contain only lower case letters | |
| JAVA0002 | 0.00 | JAVA0002 Package name does not begin with a top level domain name or country code | |
| JAVA0003 | 0.00 | JAVA0003 Minimize use of on-demand (.*) imports | |
| JAVA0004 | 0.00 | JAVA0004 Unnecessary import from java.lang | |
| JAVA0005 | 1.00 | JAVA0005 Imports not in specified order | |
| JAVA0006 | 0.00 | JAVA0006 Empty finally block | |
| JAVA0007 | 0.00 | JAVA0007 Should not declare public field | |
| JAVA0008 | 0.00 | JAVA0008 Empty catch block | |
| JAVA0009 | 0.00 | JAVA0009 Protected member in final class | |
| JAVA0010 | 0.00 | JAVA0010 Non-instantiable class does not contain a non-private static member | |
| JAVA0011 | 0.00 | JAVA0011 Abstract class does not contain an abstract method | |
| JAVA0012 | 0.00 | JAVA0012 Non-constructor method with same name as declaring class | |
| JAVA0013 | 0.00 | JAVA0013 Non-blank final field is not static | |
| JAVA0014 | 0.00 | JAVA0014 Class with only static members has non-private constructor | |
| JAVA0015 | 0.00 | JAVA0015 Package class contains public nested type | |
| JAVA0016 | 0.00 | JAVA0016 Abstract class contains public constructor | |
| JAVA0017 | 0.00 | JAVA0017 Class name does not have required form | |
| JAVA0018 | 0.00 | JAVA0018 Method name does not have required form | |
| JAVA0019 | 0.00 | JAVA0019 Interface name does not have required form | |
| JAVA0020 | 0.00 | JAVA0020 Field name does not have required form | |
| JAVA0021 | 0.00 | JAVA0021 Interface method name does not have required form | |
| JAVA0022 | 0.00 | JAVA0022 Static final field name does not have required form | |
| JAVA0023 | 0.00 | JAVA0023 Empty finalize method | |
| JAVA0024 | 0.00 | JAVA0024 Empty class | |
| JAVA0025 | 0.00 | JAVA0025 Method override is empty | |
| JAVA0026 | 0.00 | JAVA0026 Finalize method with parameters | |
| JAVA0029 | 0.00 | JAVA0029 Private method not used | |
| JAVA0030 | 0.00 | JAVA0030 Private field not used | |
| JAVA0031 | 0.00 | JAVA0031 Case statement not properly closed | |
| JAVA0032 | 0.00 | JAVA0032 Switch statement missing default | |
| JAVA0033 | 0.00 | JAVA0033 default: not last case in switch statement | |
| JAVA0034 | 0.00 | JAVA0034 Missing braces in if statement | |
| JAVA0035 | 0.00 | JAVA0035 Missing braces in for statement | |
| JAVA0036 | 0.00 | JAVA0036 Missing braces in while statement | |
| JAVA0038 | 0.00 | JAVA0038 Non-case label in switch statement | |
| JAVA0039 | 0.00 | JAVA0039 Break statement with label | |
| JAVA0040 | 0.00 | JAVA0040 Switch statement contains N cases (maximum: M) | |
| JAVA0041 | 0.00 | JAVA0041 Nested synchronized block | |
| JAVA0042 | 0.00 | JAVA0042 Empty synchronized statement | |
| JAVA0043 | 0.00 | JAVA0043 Inner class does not use outer class | |
| JAVA0044 | 0.00 | JAVA0044 Serializable class with no instance variables | |
| JAVA0045 | 0.00 | JAVA0045 Serializable class with only transient fields | |
| JAVA0046 | 0.00 | JAVA0046 Name of class not derived from Exception ends with 'Exception' | |
| JAVA0047 | 0.00 | JAVA0047 Serializable class derives from invalid base class | |
| JAVA0048 | 0.00 | JAVA0048 Name of class derived from Exception does not end with 'Exception' | |
| JAVA0049 | 0.00 | JAVA0049 Nested block at depth N (maximum: M) | |
| JAVA0050 | 0.00 | JAVA0050 Class derives from java.lang.Error | |
| JAVA0051 | 0.00 | JAVA0051 Class derives from java.lang.RuntimeException | |
| JAVA0052 | 0.00 | JAVA0052 Class derives from java.lang.Throwable | |
| JAVA0053 | 0.00 | JAVA0053 Unused label | |
| JAVA0054 | 0.00 | JAVA0054 Inheritance depth N exceeds maximum M | |
| JAVA0055 | 0.00 | JAVA0055 Class should be interface | |
| JAVA0056 | 0.00 | JAVA0056 Unnecessary abstract modifier for interface or annotation | |
| JAVA0057 | 0.00 | JAVA0057 Unnecessary default constructor | |
| JAVA0058 | 0.00 | JAVA0058 Constructor calls super() | |
| JAVA0059 | 0.00 | JAVA0059 Method override only calls super() | |
| JAVA0061 | 0.00 | JAVA0061 Inaccessible member in anonymous class | |
| JAVA0062 | 0.00 | JAVA0062 Public class missing public member or protected constructor | |
| JAVA0063 | 0.00 | JAVA0063 Identifier name should not contain '$' | |
| JAVA0064 | 0.00 | JAVA0064 N variations of identifier name (maximum: M) | |
| JAVA0065 | 0.00 | JAVA0065 Unnecessary final modifier for method in final class | |
| JAVA0066 | 0.00 | JAVA0066 Unnecessary modifier for interface nested type | |
| JAVA0067 | 0.00 | JAVA0067 Array descriptor on identifier name | |
| JAVA0068 | 0.00 | JAVA0068 Modifiers not declared in recommended order | |
| JAVA0071 | 0.00 | JAVA0071 Strings compared with == | |
| JAVA0073 | 0.00 | JAVA0073 Integer division in floating-point context | |
| JAVA0074 | 0.00 | JAVA0074 Use of Object.notify() | |
| JAVA0075 | 0.00 | JAVA0075 Method parameter hides field | |
| JAVA0076 | 0.00 | JAVA0076 Use of magic number | |
| JAVA0077 | 0.00 | JAVA0077 Private field not used in declaring class | |
| JAVA0078 | 0.00 | JAVA0078 Floating point values compared with == | |
| JAVA0079 | 0.00 | JAVA0079 Use of instance to reference static member | |
| JAVA0080 | 0.00 | JAVA0080 Import declaration not used | |
| JAVA0081 | 0.00 | JAVA0081 Boolean literal in comparison | |
| JAVA0082 | 0.00 | JAVA0082 Unnecessary widening cast | |
| JAVA0083 | 0.00 | JAVA0083 Unnecessary instanceof test | |
| JAVA0084 | 0.00 | JAVA0084 Should use compound assignment operator | |
| JAVA0085 | 0.00 | JAVA0085 Use of sun.* class | |
| JAVA0087 | 0.00 | JAVA0087 Use of Thread.sleep() | |
| JAVA0089 | 0.00 | JAVA0089 Use of restricted package | |
| JAVA0092 | 0.00 | JAVA0092 Use of restricted type | |
| JAVA0093 | 0.00 | JAVA0093 Redundant assignment | |
| JAVA0094 | 0.00 | JAVA0094 Field hides a superclass field | |
| JAVA0095 | 0.00 | JAVA0095 Uninitialized private field | |
| JAVA0096 | 0.00 | JAVA0096 Field in nested class hides outer field | |
| JAVA0098 | 0.00 | JAVA0098 Minimize use of implicit field initializers | |
| JAVA0100 | 0.00 | JAVA0100 Class contains N non-final fields (maximum: M) | |
| JAVA0101 | 0.00 | JAVA0101 Unnecessary modifier for field in interface | |
| JAVA0102 | 0.00 | JAVA0102 Last statement in finalize() not super.finalize() | |
| JAVA0103 | 0.00 | JAVA0103 Explicit call to finalize() | |
| JAVA0104 | 0.00 | JAVA0104 finalize() only calls super.finalize() | |
| JAVA0105 | 0.00 | JAVA0105 Duplicate import declaration | |
| JAVA0106 | 0.00 | JAVA0106 Unnecessary import from current package | |
| JAVA0108 | 9.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 12.00 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0111 | 0.00 | JAVA0111 Incorrect javadoc: @return tag for void method | |
| JAVA0112 | 0.00 | JAVA0112 Incorrect javadoc: no exception 'exception' in throws | |
| JAVA0113 | 0.00 | JAVA0113 Incorrect javadoc: no @author tag | |
| JAVA0114 | 0.00 | JAVA0114 Incorrect javadoc: no @version tag | |
| JAVA0115 | 14.00 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0116 | 0.00 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0117 | 0.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 0.00 | JAVA0118 Missing javadoc: type 'type' | |
| JAVA0119 | 0.00 | JAVA0119 Control variable changed within body of for loop | |
| JAVA0123 | 0.00 | JAVA0123 Use all three components of for loop | |
| JAVA0125 | 0.00 | JAVA0125 Continue statement with label | |
| JAVA0126 | 50.00 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0128 | 0.00 | JAVA0128 Public constructor in non-public class | |
| JAVA0130 | 0.00 | JAVA0130 Non-static method does not use instance fields | |
| JAVA0131 | 0.00 | JAVA0131 Compatible method does not override base | |
| JAVA0132 | 6.00 | JAVA0132 Method overload with compatible signature | |
| JAVA0133 | 0.00 | JAVA0133 Non-synchronized method overrides synchronized method | |
| JAVA0135 | 0.00 | JAVA0135 Only one of Object.equals and Object.hashCode defined: missing 'method' | |
| JAVA0136 | 1.00 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0137 | 0.00 | JAVA0137 Non-abstract class missing constructor | |
| JAVA0138 | 0.00 | JAVA0138 N parameters defined for method (maximum: M) | |
| JAVA0139 | 0.00 | JAVA0139 Definition of main other than public static void main(java.lang.String[]) | |
| JAVA0141 | 16.00 | JAVA0141 Unnecessary modifier for method in interface | |
| JAVA0143 | 0.00 | JAVA0143 Synchronized method | |
| JAVA0144 | 8.00 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0145 | 0.00 | JAVA0145 Tab character used in source file | |
| JAVA0150 | 0.00 | JAVA0150 java.lang.Error (or subclass) thrown | |
| JAVA0153 | 0.00 | JAVA0153 Inefficient conversion of integer to string | |
| JAVA0159 | 0.00 | JAVA0159 Inefficient conversion of string to integer | |
| JAVA0160 | 0.00 | JAVA0160 Method does not throw specified exception | |
| JAVA0161 | 0.00 | JAVA0161 Conditional wait() not in loop | |
| JAVA0163 | 0.00 | JAVA0163 Empty statement | |
| JAVA0165 | 0.00 | JAVA0165 Conflicting return statement in finally block | |
| JAVA0166 | 0.00 | JAVA0166 Generic exception caught | |
| JAVA0167 | 0.00 | JAVA0167 ThreadDeath not rethrown | |
| JAVA0169 | 0.00 | JAVA0169 Unnecessary catch block: exception 'exception' | |
| JAVA0170 | 0.00 | JAVA0170 Caught exception not derived from java.lang.Exception | |
| JAVA0171 | 0.00 | JAVA0171 Unused local variable | |
| JAVA0173 | 0.00 | JAVA0173 Unused method parameter | |
| JAVA0174 | 0.00 | JAVA0174 Assigned local variable never used | |
| JAVA0175 | 0.00 | JAVA0175 Successive assignment to variable | |
| JAVA0176 | 0.00 | JAVA0176 Local variable name does not have required form | |
| JAVA0177 | 0.00 | JAVA0177 Variable declaration missing initializer | |
| JAVA0179 | 0.00 | JAVA0179 Local variable hides visible field | |
| JAVA0233 | 0.00 | JAVA0233 Definition of serialVersionUID other than 'private static final long serialVersionUID' | |
| JAVA0234 | 0.00 | JAVA0234 Class is Serializable but does not define serialVersionUID | |
| JAVA0235 | 0.00 | JAVA0235 Class defines serialVersionUID but does not implement Serializable | |
| JAVA0236 | 0.00 | JAVA0236 Attempt to clone an object which does not implement Cloneable | |
| JAVA0237 | 0.00 | JAVA0237 Class implements Cloneable but does not have public clone method | |
| JAVA0238 | 1.00 | JAVA0238 Clone method does not call super.clone() | |
| JAVA0239 | 0.00 | JAVA0239 Class declares 'readObject' or 'writeObject' but does not implement Serializable | |
| JAVA0240 | 0.00 | JAVA0240 Serializable class which declares readObject or writeObject but not both | |
| JAVA0241 | 0.00 | JAVA0241 'readObject' or 'writeObject' should be declared private in Serializable class | |
| JAVA0242 | 0.00 | JAVA0242 Transient field in non-Serializable class | |
| JAVA0243 | 0.00 | JAVA0243 'readResolve' or 'writeReplace' should be declared private or protected | |
| JAVA0244 | 0.00 | JAVA0244 Field or method name in subclass differs only by case from inherited field or method | |
| JAVA0245 | 0.00 | JAVA0245 JUnit TestCase with non-trivial constructor | |
| JAVA0246 | 0.00 | JAVA0246 JUnit assertXXX statement missing message parameter | |
| JAVA0247 | 0.00 | JAVA0247 JUnit 'setUp()' and 'tearDown()' should call super method | |
| JAVA0248 | 0.00 | JAVA0248 JUnit method 'setUp' or 'tearDown' with incorrect signature | |
| JAVA0249 | 0.00 | JAVA0249 JUnit TestCase 'suite()' should be declared static | |
| JAVA0250 | 0.00 | JAVA0250 JUnit TestCase declares testXXX method with incorrect signature | |
| JAVA0251 | 0.00 | JAVA0251 Use '%n' for line breaks in printf/format for platform independence | |
| JAVA0252 | 0.00 | JAVA0252 'enum' is a Java 1.5 reserved word | |
| JAVA0253 | 0.00 | JAVA0253 Not all enum constants consumed in switch statement | |
| JAVA0254 | 0.00 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| JAVA0255 | 0.00 | JAVA0255 Result of method invocation not used | |
| JAVA0256 | 0.00 | JAVA0256 Assignment of external collection/array to field | |
| JAVA0257 | 0.00 | JAVA0257 Use of 'Constant Interface' anti-pattern | |
| JAVA0258 | 0.00 | JAVA0258 Implement Iterable for foreach compatibility | |
| JAVA0259 | 0.00 | JAVA0259 Return of collection/array field | |
| JAVA0260 | 0.00 | JAVA0260 Use 'enum' instead of Enumerated Type pattern | |
| JAVA0261 | 0.00 | JAVA0261 Use specialized Enum collection types | |
| JAVA0262 | 0.00 | JAVA0262 Use of char in integer context | |
| JAVA0263 | 0.00 | JAVA0263 Long literal ends with 'l' instead of 'L' | |
| JAVA0264 | 0.00 | JAVA0264 Integer math in long context - check for overflow | |
| JAVA0265 | 0.00 | JAVA0265 Use of Throwable.printStackTrace() | |
| JAVA0266 | 0.00 | JAVA0266 Use of System.out | |
| JAVA0267 | 0.00 | JAVA0267 Use of System.err | |
| JAVA0269 | 0.00 | JAVA0269 Contents of StringBuffer never used | |
| JAVA0270 | 0.00 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| JAVA0271 | 0.00 | JAVA0271 Minimize use of on-demand (.*) static imports | |
| JAVA0272 | 0.00 | JAVA0272 Thread.run() called | |
| JAVA0273 | 0.00 | JAVA0273 Non-final derivative of Thread calls start() in constructor | |
| JAVA0274 | 0.00 | JAVA0274 Serializable class has a synchronized readObject() | |
| JAVA0275 | 0.00 | JAVA0275 Serializable class has a synchronized writeObject() and no other synchronized methods | |
| JAVA0276 | 0.00 | JAVA0276 Unnecessary use of String constructor | |
| JAVA0277 | 0.00 | JAVA0277 Iterator.next() implementation does not throw NoSuchElementException | |
| JAVA0278 | 0.00 | JAVA0278 Unnecessary use of Boolean constructor | |
| JAVA0279 | 0.00 | JAVA0279 Serialization method readObject or readObjectNoData calls an overridable method | |
| JAVA0280 | 0.00 | JAVA0280 IllegalMonitorStateException caught | |
| JAVA0281 | 0.00 | JAVA0281 Iterator.next() not called in loop | |
| JAVA0282 | 0.00 | JAVA0282 Call to Iterator.next() in loop which does not test Iterator.hasNext() | |
| JAVA0283 | 0.00 | JAVA0283 Control variable not updated in loop body | |
| JAVA0284 | 0.00 | JAVA0284 Explicit garbage collection | |
| JAVA0285 | 0.00 | JAVA0285 Dereference of potentially null variable | |
| JAVA0286 | 0.00 | JAVA0286 Dereference of null variable | |
| JAVA0287 | 0.00 | JAVA0287 Unnecessary null check | |
| JAVA0288 | 0.00 | JAVA0288 Inconsistent null check | |
| LINES | 836.00 | Number of lines in the source file | |
| LINE_COMMENT | 0.00 | Number of line comments | |
| LOC | 91.00 | Lines of code | |
| LOGICAL_LINES | 85.00 | Number of statements | |
| LOOPS | 0.00 | Number of loops | |
| NEST_DEPTH | 0.00 | Maximum nesting depth | |
| OPERANDS | 276.00 | Number of operands | |
| OPERATORS | 420.00 | Number of operators | |
| PARAMS | 42.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 696.00 | Halstead program length | |
| PROGRAM_VOCAB | 174.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 0.00 | Number of return points from functions | |
| SIZE | 35753.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 155.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 19.00 | Number of unique operators | |
| WHITESPACE | 87.00 | Number of whitespace lines | |