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Parallel programming on the go
/*
* Licensed 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 com.gh.bmd.jrt.runner;
import java.util.concurrent.TimeUnit;
import javax.annotation.Nonnull;
/**
* Class implementing a queued synchronous runner.
*
* The runner maintains an internal buffer of executions that are consumed only when the last one
* completes, thus avoiding overflowing the call stack because of nested calls to other routines.
*
* While it is more memory and CPU consuming than the sequential implementation, it avoids overflows
* of the call stack, and tries to prevent blocking the execution of the calling thread by
* reordering delayed executions inside the queue.
*
* Created by davide-maestroni on 9/18/14.
*
* @see com.gh.bmd.jrt.runner.SequentialRunner SequentialRunner
*/
class QueuedRunner implements Runner {
public void cancel(@Nonnull final Execution execution) {
LocalQueue.cancel(execution);
}
public boolean isExecutionThread() {
return false;
}
public void run(@Nonnull final Execution execution, final long delay,
@Nonnull final TimeUnit timeUnit) {
LocalQueue.run(execution, delay, timeUnit);
}
}