hadoop RunnableCallable 源码
haddop RunnableCallable 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-httpfs/src/main/java/org/apache/hadoop/lib/lang/RunnableCallable.java
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.lib.lang;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.lib.util.Check;
import java.util.concurrent.Callable;
/**
* Adapter class that allows <code>Runnable</code>s and <code>Callable</code>s to
* be treated as the other.
*/
@InterfaceAudience.Private
public class RunnableCallable implements Callable<Void>, Runnable {
private Runnable runnable;
private Callable<?> callable;
/**
* Constructor that takes a runnable.
*
* @param runnable runnable.
*/
public RunnableCallable(Runnable runnable) {
this.runnable = Check.notNull(runnable, "runnable");
}
/**
* Constructor that takes a callable.
*
* @param callable callable.
*/
public RunnableCallable(Callable<?> callable) {
this.callable = Check.notNull(callable, "callable");
}
/**
* Invokes the wrapped callable/runnable as a callable.
*
* @return void
*
* @throws Exception thrown by the wrapped callable/runnable invocation.
*/
@Override
public Void call() throws Exception {
if (runnable != null) {
runnable.run();
} else {
callable.call();
}
return null;
}
/**
* Invokes the wrapped callable/runnable as a runnable.
*
* @throws RuntimeException thrown by the wrapped callable/runnable invocation.
*/
@Override
public void run() {
if (runnable != null) {
runnable.run();
} else {
try {
callable.call();
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
}
/**
* Returns the class name of the wrapper callable/runnable.
*
* @return the class name of the wrapper callable/runnable.
*/
@Override
public String toString() {
return (runnable != null) ? runnable.getClass().getSimpleName() : callable.getClass().getSimpleName();
}
}
相关信息
相关文章
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦