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ojb.server.lockstrategy
Class RWSerializableStrategy  

java.lang.Object
  ojb.server.lockstrategy.RWSerializableStrategy

All Implemented Interfaces:

ReaderWriterLock

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public class RWSerializableStrategy

extends java.lang.Object

implements ReaderWriterLock

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Field Summary
private  java.util.Set	readers
private  org.odmg.Transaction	writer

 

Fields inherited from interface ojb.server.lockstrategy.ReaderWriterLock

RW_READ_COMMITTED, RW_READ_UNCOMMITTED, RW_REPEATABLE_READ, RW_SERIALIZABLE

 

Constructor Summary

RWSerializableStrategy()

 

Method Summary
boolean	checkRead(org.odmg.Transaction tx)           checkRead -- Identify if Read access is granted.
boolean	checkWrite(org.odmg.Transaction tx)           checkWrite -- Determine if Write access is granted.
java.lang.String	getLockType(org.odmg.Transaction t)           getLockType - Returns an "R" if it is a Read lock, "W" if it is a Write lock, or "0" (zero) if it isn't locked.
int	getStrategy()           getStrategy -- Return ReaderWriterLock.RW_SERIALIZABLE
boolean	read(org.odmg.Transaction r)           read -- Acquire a Read lock for the given Transaction.
boolean	release(org.odmg.Transaction t)           release -- Release the hold on the object.
boolean	upgrade(org.odmg.Transaction u)           upgrade -- Try to upgrade the lock to Write.
boolean	write(org.odmg.Transaction w)           write -- Acquire a Write lock for the given transaction.

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

readers

private java.util.Set readers

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writer

private org.odmg.Transaction writer

Constructor Detail

RWSerializableStrategy

public RWSerializableStrategy()

Method Detail

read

public boolean read(org.odmg.Transaction r)

read -- Acquire a Read lock for the given Transaction.

Specified by:

read in interface ReaderWriterLock

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write

public boolean write(org.odmg.Transaction w)

write -- Acquire a Write lock for the given transaction.

Specified by:

write in interface ReaderWriterLock

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upgrade

public boolean upgrade(org.odmg.Transaction u)

upgrade -- Try to upgrade the lock to Write.

Specified by:

upgrade in interface ReaderWriterLock

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release

public boolean release(org.odmg.Transaction t)

release -- Release the hold on the object.

Specified by:

release in interface ReaderWriterLock

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getLockType

public java.lang.String getLockType(org.odmg.Transaction t)

getLockType - Returns an "R" if it is a Read lock, "W" if it is a Write lock, or "0" (zero) if it isn't locked.

Specified by:

getLockType in interface ReaderWriterLock

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getStrategy

public int getStrategy()

getStrategy -- Return ReaderWriterLock.RW_SERIALIZABLE

Specified by:

getStrategy in interface ReaderWriterLock

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checkRead

public boolean checkRead(org.odmg.Transaction tx)

checkRead -- Identify if Read access is granted.

Specified by:

checkRead in interface ReaderWriterLock

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checkWrite

public boolean checkWrite(org.odmg.Transaction tx)

checkWrite -- Determine if Write access is granted.

Specified by:

checkWrite in interface ReaderWriterLock

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