com.sap.cloud.server.odata

Class MetadataLock

java.lang.Object

com.sap.cloud.server.odata.MetadataLock

public class MetadataLock
extends java.lang.Object

A lock for ensuring thread-safe access to mutable service metadata.

Constructor Summary

Constructors

Constructor and Description
MetadataLock()

Method Summary

Modifier and Type	Method and Description
com.sap.cloud.server.odata.core.ReadWriteMutex	getMutex() Return read and write mutex
void	readLock(com.sap.cloud.server.odata.core.Action0 action) Lock metadata to perform action that doesn't change metadata.
void	writeLock(com.sap.cloud.server.odata.core.Action0 action) Lock metadata to perform action that changes metadata.

Methods inherited from class java.lang.Object

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

Constructor Detail

MetadataLock

public MetadataLock()

Method Detail

getMutex

public com.sap.cloud.server.odata.core.ReadWriteMutex getMutex()

Return read and write mutex

Returns:

Read and write mutex

readLock

public void readLock(com.sap.cloud.server.odata.core.Action0 action)

Lock metadata to perform action that doesn't change metadata. Note: This is a non-reentrant lock. If a thread tries to acquire a lock while already holding a lock, the thread will hang.

Parameters:

action - Action to perform while a shared read lock (shared) is held.

writeLock

public void writeLock(com.sap.cloud.server.odata.core.Action0 action)

Lock metadata to perform action that changes metadata.

Parameters:

action - Action to perform while an exclusive write lock is held.