Java Doc for ReadWriteLockManager.java in  » Database-JDBC-Connection-Pool » Apache-commons-transaction-1.2 » org » apache » commons » transaction » locking » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database JDBC Connection Pool » Apache commons transaction 1.2 » org.apache.commons.transaction.locking   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.apache.commons.transaction.locking.GenericLockManager       org.apache.commons.transaction.locking.ReadWriteLockManager All known Subclasses:   org.apache.commons.transaction.locking.ReadWriteUpgradeLockManager, ReadWriteLockManager public class ReadWriteLockManager extends GenericLockManager (Code) Manager for org.apache.commons.transaction.locking.ReadWriteLock s on resources. version:    $Id: ReadWriteLockManager.java 493628 2007-01-07 01:42:48Z joerg $ since:    1.1 Constructor Summary public   ReadWriteLockManager(LoggerFacade logger, long timeoutMSecs)      Creates a new read/write lock manager. protected   ReadWriteLockManager(int maxLockLevel, LoggerFacade logger, long timeoutMSecs)      Method Summary public  boolean checkReadLock(Object ownerId, Object resourceId)      Determines if a shared, reentrant read lock on a resource could be acquired without actually acquiring it. public  boolean checkWriteLock(Object ownerId, Object resourceId)      Determines if an exclusive, reentrant write lock on a resource could be acquired without actually acquiring it. protected  GenericLock createLock(Object resourceId)      public  boolean hasReadLock(Object ownerId, Object resourceId)      Determines if a shared, reentrant read lock on a resource is held by an owner. public  boolean hasWriteLock(Object ownerId, Object resourceId)      Determines if an exclusive, reentrant write lock on a resource is held by an owner. public  void readLock(Object ownerId, Object resourceId)      Tries to acquire a shared, reentrant read lock on a resource. public  boolean tryReadLock(Object ownerId, Object resourceId)      Tries to acquire a shared, reentrant read lock on a resource. public  boolean tryWriteLock(Object ownerId, Object resourceId)      Tries to acquire an exclusive, reentrant write lock on a resource. public  void writeLock(Object ownerId, Object resourceId)      Tries to acquire an exclusive, reentrant write lock on a resource. Constructor Detail ReadWriteLockManager public ReadWriteLockManager(LoggerFacade logger, long timeoutMSecs)(Code) Creates a new read/write lock manager. Parameters:   logger - generic logger used for all kind of debug logging Parameters:   timeoutMSecs - specifies the maximum time to wait for a lock in milliseconds ReadWriteLockManager protected ReadWriteLockManager(int maxLockLevel, LoggerFacade logger, long timeoutMSecs) throws IllegalArgumentException(Code) Method Detail checkReadLock public boolean checkReadLock(Object ownerId, Object resourceId)(Code) Determines if a shared, reentrant read lock on a resource could be acquired without actually acquiring it. This method does not block, but immediatly returns. If a lock is not available false will be returned. Parameters:   ownerId - a unique id identifying the entity that wants to acquire thislock Parameters:   resourceId - the resource to get the lock for true if the lock could be acquired, false otherwise checkWriteLock public boolean checkWriteLock(Object ownerId, Object resourceId)(Code) Determines if an exclusive, reentrant write lock on a resource could be acquired without actually acquiring it. This method does not block, but immediatly returns. If a lock is not available false will be returned. Parameters:   ownerId - a unique id identifying the entity that wants to acquire thislock Parameters:   resourceId - the resource to get the lock for true if the lock could be acquired, false otherwise createLock protected GenericLock createLock(Object resourceId)(Code) hasReadLock public boolean hasReadLock(Object ownerId, Object resourceId)(Code) Determines if a shared, reentrant read lock on a resource is held by an owner. Parameters:   ownerId - a unique id identifying the entity that wants to check thislock Parameters:   resourceId - the resource to get the lock for true if the lock is held by the owner, false otherwise hasWriteLock public boolean hasWriteLock(Object ownerId, Object resourceId)(Code) Determines if an exclusive, reentrant write lock on a resource is held by an owner. Parameters:   ownerId - a unique id identifying the entity that wants to check thislock Parameters:   resourceId - the resource to get the lock for true if the lock is held by the owner, false otherwise readLock public void readLock(Object ownerId, Object resourceId) throws LockException(Code) Tries to acquire a shared, reentrant read lock on a resource. This method blocks and waits for the lock in case it is not avaiable. If there is a timeout or a deadlock or the thread is interrupted a LockException is thrown. Parameters:   ownerId - a unique id identifying the entity that wants to acquire thislock Parameters:   resourceId - the resource to get the lock for throws:   LockException - will be thrown when the lock can not be acquired tryReadLock public boolean tryReadLock(Object ownerId, Object resourceId)(Code) Tries to acquire a shared, reentrant read lock on a resource. This method does not block, but immediatly returns. If a lock is not available false will be returned. Parameters:   ownerId - a unique id identifying the entity that wants to acquire thislock Parameters:   resourceId - the resource to get the lock for true if the lock has been acquired, false otherwise tryWriteLock public boolean tryWriteLock(Object ownerId, Object resourceId)(Code) Tries to acquire an exclusive, reentrant write lock on a resource. This method does not block, but immediatly returns. If a lock is not available false will be returned. Parameters:   ownerId - a unique id identifying the entity that wants to acquire thislock Parameters:   resourceId - the resource to get the lock for true if the lock has been acquired, false otherwise writeLock public void writeLock(Object ownerId, Object resourceId) throws LockException(Code) Tries to acquire an exclusive, reentrant write lock on a resource. This method blocks and waits for the lock in case it is not avaiable. If there is a timeout or a deadlock or the thread is interrupted a LockException is thrown. Parameters:   ownerId - a unique id identifying the entity that wants to acquire thislock Parameters:   resourceId - the resource to get the lock for throws:   LockException - will be thrown when the lock can not be acquired Fields inherited from org.apache.commons.transaction.locking.GenericLockManager final public static long DEFAULT_CHECK_THRESHHOLD(Code)(Java Doc) final public static long DEFAULT_TIMEOUT(Code)(Java Doc) protected long checkThreshhold(Code)(Java Doc) protected Map effectiveGlobalTimeouts(Code)(Java Doc) protected Map globalLocks(Code)(Java Doc) protected Map globalOwners(Code)(Java Doc) protected long globalTimeoutMSecs(Code)(Java Doc) protected LoggerFacade logger(Code)(Java Doc) protected int maxLockLevel(Code)(Java Doc) protected Set timedOutOwners(Code)(Java Doc) Methods inherited from org.apache.commons.transaction.locking.GenericLockManager protected void addOwner(Object ownerId, GenericLock lock)(Code)(Java Doc) public MultiLevelLock atomicGetOrCreateLock(Object resourceId)(Code)(Java Doc) public boolean checkLock(Object ownerId, Object resourceId, int targetLockLevel, boolean reentrant)(Code)(Java Doc) protected GenericLock createLock(Object resourceId)(Code)(Java Doc) protected void doLock(GenericLock lock, Object ownerId, Object resourceId, int targetLockLevel, int compatibility, boolean preferred, long timeoutMSecs)(Code)(Java Doc) public Set getAll(Object ownerId)(Code)(Java Doc) public int getLevel(Object ownerId, Object resourceId)(Code)(Java Doc) public MultiLevelLock getLock(Object resourceId)(Code)(Java Doc) public Collection getLocks()(Code)(Java Doc) protected long getNextGlobalConflictTimeout(Set conflicts)(Code)(Java Doc) public boolean hasLock(Object ownerId, Object resourceId, int lockLevel)(Code)(Java Doc) public void lock(Object ownerId, Object resourceId, int targetLockLevel, boolean reentrant) throws LockException(Code)(Java Doc) public void lock(Object ownerId, Object resourceId, int targetLockLevel, boolean reentrant, long timeoutMSecs) throws LockException(Code)(Java Doc) public void lock(Object ownerId, Object resourceId, int targetLockLevel, int compatibility, boolean preferred, long timeoutMSecs) throws LockException(Code)(Java Doc) public boolean release(Object ownerId, Object resourceId)(Code)(Java Doc) public void releaseAll(Object ownerId)(Code)(Java Doc) protected void releaseAllNoTimeOutReset(Object ownerId)(Code)(Java Doc) protected boolean releaseTimedOutOwners()(Code)(Java Doc) public void removeLock(MultiLevelLock lock)(Code)(Java Doc) protected void removeOwner(Object ownerId, GenericLock lock)(Code)(Java Doc) public void startGlobalTimeout(Object ownerId, long timeoutMSecs)(Code)(Java Doc) protected boolean timeOut(Object ownerId)(Code)(Java Doc) protected void timeoutCheck(Object ownerId) throws LockException(Code)(Java Doc) public synchronized String toString()(Code)(Java Doc) public boolean tryLock(Object ownerId, Object resourceId, int targetLockLevel, boolean reentrant)(Code)(Java Doc) protected boolean wouldDeadlock(Object ownerId, Set path)(Code)(Java Doc) Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)