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HADOOP-7931. o.a.h.ipc.WritableRpcEngine should have a way to force initialization. Contributed by Aaron T. Myers 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1215358 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Aaron Myers 2011-12-17 00:14:36 +00:00
parent 9b7617a909
commit 059290ce3a
2 changed files with 31 additions and 7 deletions
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3
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -141,6 +141,9 @@ Trunk (unreleased changes)
HADOOP-7892. IPC logs too verbose after "RpcKind" introduction (todd)
HADOOP-7931. o.a.h.ipc.WritableRpcEngine should have a way to force
initialization (atm)
OPTIMIZATIONS
HADOOP-7761. Improve the performance of raw comparisons. (todd)

33
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ipc/WritableRpcEngine.java
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@ -48,18 +48,39 @@ import org.apache.hadoop.conf.*;
public class WritableRpcEngine implements RpcEngine {
private static final Log LOG = LogFactory.getLog(RPC.class);
static { // Register the rpcRequest deserializer for WritableRpcEngine
org.apache.hadoop.ipc.Server.registerProtocolEngine(RpcKind.RPC_WRITABLE,
Invocation.class, new Server.WritableRpcInvoker());
}
//writableRpcVersion should be updated if there is a change
//in format of the rpc messages.
// 2L - added declared class to Invocation
public static final long writableRpcVersion = 2L;
/**
* Whether or not this class has been initialized.
*/
private static boolean isInitialized = false;
static {
ensureInitialized();
}
/**
* Initialize this class if it isn't already.
*/
public static synchronized void ensureInitialized() {
if (!isInitialized) {
initialize();
}
}
/**
* Register the rpcRequest deserializer for WritableRpcEngine
*/
private static synchronized void initialize() {
org.apache.hadoop.ipc.Server.registerProtocolEngine(RpcKind.RPC_WRITABLE,
Invocation.class, new Server.WritableRpcInvoker());
isInitialized = true;
}
/** A method invocation, including the method name and its parameters.*/
private static class Invocation implements Writable, Configurable {