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Redis Java client with features of In-Memory Data Grid
/**
* Copyright (c) 2013-2024 Nikita Koksharov
*
* 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 org.redisson.pubsub;
import org.redisson.PubSubEntry;
import org.redisson.client.BaseRedisPubSubListener;
import org.redisson.client.ChannelName;
import org.redisson.client.RedisPubSubListener;
import org.redisson.client.codec.LongCodec;
import org.redisson.misc.AsyncSemaphore;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
/**
*
* @author Nikita Koksharov
*
*/
abstract class PublishSubscribe> {
private final ConcurrentMap entries = new ConcurrentHashMap<>();
private final PublishSubscribeService service;
PublishSubscribe(PublishSubscribeService service) {
super();
this.service = service;
}
public void unsubscribe(E entry, String entryName, String channelName) {
ChannelName cn = new ChannelName(channelName);
AsyncSemaphore semaphore = service.getSemaphore(cn);
semaphore.acquire().thenAccept(c -> {
if (entry.release() == 0) {
entries.remove(entryName);
service.unsubscribeLocked(cn)
.whenComplete((r, e) -> {
semaphore.release();
});
} else {
semaphore.release();
}
});
}
public void timeout(CompletableFuture> promise) {
service.timeout(promise);
}
public void timeout(CompletableFuture> promise, long timeout) {
service.timeout(promise, timeout);
}
public CompletableFuture subscribe(String entryName, String channelName) {
AsyncSemaphore semaphore = service.getSemaphore(new ChannelName(channelName));
CompletableFuture newPromise = new CompletableFuture<>();
semaphore.acquire().thenAccept(c -> {
if (newPromise.isDone()) {
semaphore.release();
return;
}
E entry = entries.get(entryName);
if (entry != null) {
entry.acquire();
semaphore.release();
entry.getPromise().whenComplete((r, e) -> {
if (e != null) {
newPromise.completeExceptionally(e);
return;
}
newPromise.complete(r);
});
return;
}
E value = createEntry(newPromise);
value.acquire();
E oldValue = entries.putIfAbsent(entryName, value);
if (oldValue != null) {
oldValue.acquire();
semaphore.release();
oldValue.getPromise().whenComplete((r, e) -> {
if (e != null) {
newPromise.completeExceptionally(e);
return;
}
newPromise.complete(r);
});
return;
}
RedisPubSubListener
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