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1 - Using SharedHashMap | 2 - "no-copy" mode | 3 - Concurrency handling and thread safety | 4 - Appendix: interfaces supported | View All

In this article Jack Shirazi and Peter Lawrey give a worked example of using SharedHashMap, a high performance persisted off-heap hash map, shareable across processes.

Appendix: interfaces supported

The generic method interfaces supported include

	//Bean field accesser
	//TYPE getFIELDNAME();
	int getValue(); //example

	//Bean field updater
	//void setFIELDNAME(TYPE value);
	void setValue(int value); //example

	//Bean field adder
	//TYPE addFIELDNAME(TYPE delta);
	int addValue(int delta); //example

	//Bean field atomic adder
	//TYPE addAtomicFIELDNAME(TYPE delta);
	int addAtomicValue(int delta); //example

	//Bean array-field accesser
	//TYPE getFIELDNAMEAt(int index);
	double getElementAt(int index); //example

	//Bean array-field updater
	//void setFIELDNAMEAt(@MaxSize(MAXSIZE) int index, TYPE value);
	void setElementAt(@MaxSize(4) int index, double value); //example

	//Bean field CAS updater
	//boolean compareAndSwapFIELDNAME(TYPE expected, TYPE value);
	boolean compareAndSwapValue(int expected, int value); //example

	//Try to acquire lock immediately
	//boolean tryLockLOCKNAME();
	boolean tryLockMyLock(); //example

	//Try to acquire lock within nanos nanoseconds
	//boolean tryLockNanosLOCKNAME(long nanos);
	boolean tryLockNanosMyLock(long nanos); //example

	//Keep trying in a busy loop to acquire the lock
	//void busyLockLOCKNAME() throws InterruptedException, IllegalStateException;
	void busyLockMyLock() throws InterruptedException, IllegalStateException; //example

	//Unlock a locked lock, throwing exception if it's not locked
	void unlockLOCKNAME() throws IllegalMonitorStateException;
	void unlockMyLock() throws IllegalMonitorStateException; //example

1 - Using SharedHashMap | 2 - "no-copy" mode | 3 - Concurrency handling and thread safety | 4 - Appendix: interfaces supported | View All