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[RIP-70-1] Optimize the back pressure mechanism of the client (#8661)
* Fix semaphore exception that failed halfway in the case of asynchronous message sending back pressure * Fix semaphore exception that failed halfway in the case of asynchronous message sending back pressure * Fix semaphore exception that failed halfway in the case of asynchronous message sending back pressure * Fixed variable typo * Fix semaphore exception that failed halfway in the case of asynchrono * Fix modifying the semaphore size at run time results in inaccurate semaphore calculations * optimize lock and introduce new lock * optimize code typo * Fix runtime modifications to semaphoreAsyncSendNum and semaphoreAsyncSendSize result in inaccurate actual semaphore values * fix fail test * adjust code typo * increase test * increase test * fix test * fix test
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client/src/main/java/org/apache/rocketmq/client/lock/ReadWriteCASLock.java
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/* | ||
* 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.rocketmq.client.lock; | ||
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import java.util.concurrent.atomic.AtomicBoolean; | ||
import java.util.concurrent.atomic.AtomicInteger; | ||
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public class ReadWriteCASLock { | ||
//true : can lock ; false : not lock | ||
private final AtomicBoolean writeLock = new AtomicBoolean(true); | ||
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private final AtomicInteger readLock = new AtomicInteger(0); | ||
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public void acquireWriteLock() { | ||
boolean isLock = false; | ||
do { | ||
isLock = writeLock.compareAndSet(true, false); | ||
} while (!isLock); | ||
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do { | ||
isLock = readLock.get() == 0; | ||
} while (!isLock); | ||
} | ||
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public void releaseWriteLock() { | ||
this.writeLock.compareAndSet(false, true); | ||
} | ||
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public void acquireReadLock() { | ||
boolean isLock = false; | ||
do { | ||
isLock = writeLock.get(); | ||
} while (!isLock); | ||
readLock.getAndIncrement(); | ||
} | ||
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public void releaseReadLock() { | ||
this.readLock.getAndDecrement(); | ||
} | ||
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public boolean getWriteLock() { | ||
return this.writeLock.get() && this.readLock.get() == 0; | ||
} | ||
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public boolean getReadLock() { | ||
return this.writeLock.get(); | ||
} | ||
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} |
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