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SynchronizedDictionaryAcquireWriteLock Method (Int32)

Oracle® Fusion Middleware .NET API Reference for Oracle Coherence
14c (14.1.1.0)
F23534-02
Acquire a write lock.

Namespace:  Tangosol.Util.Collections
Assembly:  Coherence (in Coherence.dll) Version: 14.1.1.14 (14.1.1.14)
Syntax
C#
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public bool AcquireWriteLock(
	int timeout
)

Parameters

timeout
Type: SystemInt32
Timeout in milliseconds.

Return Value

Type: Boolean
true if a lock was acquired within the specified time, false otherwise.
Remarks
This method will attempt to acquire a write lock for up to timeout milliseconds, and will return a boolean value specifying whether or not the lock was acquired successfully.

Only a single thread can hold the write lock at any given time, and no other threads will be able to acquire either a read lock or a write lock until the write lock is released.

This method should always be used in combination with a ReleaseWriteLock method in the following manner:

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if (dict.AcquireWriteLock(timeout))
{
    try
    {
        // access dictionary
    }
    finally
    {
        dict.ReleaseWriteLock();
    }
}
This will ensure that the dictionary is not accessed unless the lock was acquired successfully, and that the lock is released properly even if an exception is thrown by the code within the try block.

It is entirely up to you how to handle the case when the AcquireWriteLock method returns false. For example, you can ignore the fact, throw an exception, or retry the operation by placing the code above within a loop.

See Also