Package org.apache.commons.configuration2.sync

Enum NoOpSynchronizer

java.lang.Object

java.lang.Enum<NoOpSynchronizer>

org.apache.commons.configuration2.sync.NoOpSynchronizer

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<NoOpSynchronizer>, Synchronizer

public enum NoOpSynchronizer
extends java.lang.Enum<NoOpSynchronizer>
implements Synchronizer

An implementation of the Synchronizer interface which does not perform any synchronization.

This class is the option of choice for applications that do not access configuration concurrently. All methods required by the Synchronizer interface are just empty dummies. Therefore, this class does not have any synchronization overhead. Of course, configurations using this Synchronizer implementation are not thread-safe!

Implementation note: This class is an enumeration because only a single instance needs to exist. This instance can be shared between arbitrary configurations.

Since:

2.0

Version:

$Id: NoOpSynchronizer.java 1624601 2014-09-12 18:04:36Z oheger $

Enum Constant Summary

Enum Constants

Enum Constant	Description
INSTANCE	The single shared instance of this class.

Method Summary

Modifier and Type	Method	Description
void	beginRead()	Notifies this Synchronizer that the current thread is going to start a read operation on the managed configuration.
void	beginWrite()	Notifies this Synchronizer that the current thread is going to start a write operation on the managed configuration.
void	endRead()	Notifies this Synchronizer that the current thread has finished its read operation.
void	endWrite()	Notifies this Synchronizer that the current thread has finished its write operation.
static NoOpSynchronizer	valueOf(java.lang.String name)	Returns the enum constant of this type with the specified name.
static NoOpSynchronizer[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

INSTANCE

public static final NoOpSynchronizer INSTANCE

The single shared instance of this class.

Method Detail

values

public static NoOpSynchronizer[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (NoOpSynchronizer c : NoOpSynchronizer.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static NoOpSynchronizer valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null

beginRead

public void beginRead()

Description copied from interface: Synchronizer

Notifies this Synchronizer that the current thread is going to start a read operation on the managed configuration. This call can block if a concrete implementation decides that the thread has to wait until a specific condition is fulfilled.

Specified by:

beginRead in interface Synchronizer

endRead

public void endRead()

Description copied from interface: Synchronizer

Notifies this Synchronizer that the current thread has finished its read operation. This may cause other waiting threads to be granted access to the managed configuration.

Specified by:

endRead in interface Synchronizer

beginWrite

public void beginWrite()

Description copied from interface: Synchronizer

Notifies this Synchronizer that the current thread is going to start a write operation on the managed configuration. This call may block. For instance, a concrete implementation may suspend the thread until all read operations currently active are finished,

Specified by:

beginWrite in interface Synchronizer

endWrite

public void endWrite()

Description copied from interface: Synchronizer

Notifies this Synchronizer that the current thread has finished its write operation. This may cause other waiting threads to be granted access to the managed configuration.

Specified by:

endWrite in interface Synchronizer