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org.redisson.RedissonRemoteService Maven / Gradle / Ivy
/**
* 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;
import org.redisson.api.*;
import org.redisson.client.codec.Codec;
import org.redisson.client.codec.LongCodec;
import org.redisson.client.codec.StringCodec;
import org.redisson.client.protocol.RedisCommands;
import org.redisson.command.CommandAsyncExecutor;
import org.redisson.executor.RemotePromise;
import org.redisson.misc.CompletableFutureWrapper;
import org.redisson.remote.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicInteger;
/**
*
* @author Nikita Koksharov
*
*/
public class RedissonRemoteService extends BaseRemoteService implements RRemoteService {
public static class Entry {
RFuture future;
final AtomicInteger counter;
public Entry(int workers) {
counter = new AtomicInteger(workers);
}
public void setFuture(RFuture future) {
this.future = future;
}
public RFuture getFuture() {
return future;
}
public AtomicInteger getCounter() {
return counter;
}
}
private static final Logger log = LoggerFactory.getLogger(RedissonRemoteService.class);
private final Map, Entry> remoteMap = new ConcurrentHashMap<>();
public RedissonRemoteService(Codec codec, String name, CommandAsyncExecutor commandExecutor, String executorId) {
super(codec, name, commandExecutor, executorId);
}
public String getRequestTasksMapName(Class remoteInterface) {
String queue = getRequestQueueName(remoteInterface);
return queue + ":tasks";
}
@Override
protected CompletableFuture addAsync(String requestQueueName, RemoteServiceRequest request,
RemotePromise result) {
RFuture future = commandExecutor.evalWriteNoRetryAsync(name, LongCodec.INSTANCE, RedisCommands.EVAL_BOOLEAN,
"redis.call('hset', KEYS[2], ARGV[1], ARGV[2]);"
+ "redis.call('rpush', KEYS[1], ARGV[1]); "
+ "return 1;",
Arrays.asList(requestQueueName, requestQueueName + ":tasks"),
request.getId(), encode(request));
result.setAddFuture(future.toCompletableFuture());
return future.toCompletableFuture();
}
@Override
protected CompletableFuture removeAsync(String requestQueueName, String taskId) {
RFuture f = commandExecutor.evalWriteNoRetryAsync(name, LongCodec.INSTANCE, RedisCommands.EVAL_BOOLEAN,
"if redis.call('lrem', KEYS[1], 1, ARGV[1]) > 0 then "
+ "redis.call('hdel', KEYS[2], ARGV[1]);" +
"return 1;" +
"end;"
+ "return 0;",
Arrays.asList(requestQueueName, requestQueueName + ":tasks"),
taskId);
return f.toCompletableFuture();
}
@Override
public void register(Class remoteInterface, T object) {
register(remoteInterface, object, 1);
}
@Override
public void deregister(Class remoteInterface) {
Entry entry = remoteMap.remove(remoteInterface);
if (entry != null && entry.getFuture() != null) {
entry.getFuture().cancel(false);
}
}
@Override
public int getPendingInvocations(Class remoteInterface) {
String requestQueueName = getRequestQueueName(remoteInterface);
RBlockingQueue requestQueue = getBlockingQueue(requestQueueName, StringCodec.INSTANCE);
return requestQueue.size();
}
@Override
public RFuture getPendingInvocationsAsync(Class remoteInterface) {
String requestQueueName = getRequestQueueName(remoteInterface);
RBlockingQueue requestQueue = getBlockingQueue(requestQueueName, StringCodec.INSTANCE);
return requestQueue.sizeAsync();
}
@Override
public int getFreeWorkers(Class remoteInterface) {
Entry entry = remoteMap.get(remoteInterface);
if (entry == null) {
return 0;
}
return entry.getCounter().get();
}
@Override
public void register(Class remoteInterface, T object, int workers) {
register(remoteInterface, object, workers, commandExecutor.getServiceManager().getExecutor());
}
@Override
public void register(Class remoteInterface, T object, int workers, ExecutorService executor) {
if (workers < 1) {
throw new IllegalArgumentException("executorsAmount can't be lower than 1");
}
if (remoteMap.putIfAbsent(remoteInterface, new Entry(workers)) != null) {
return;
}
String requestQueueName = getRequestQueueName(remoteInterface);
RBlockingQueue requestQueue = getBlockingQueue(requestQueueName, StringCodec.INSTANCE);
subscribe(remoteInterface, requestQueue, executor, object);
}
@Override
public boolean tryExecute(Class remoteInterface, T object, long timeout, TimeUnit timeUnit) throws InterruptedException {
return tryExecute(remoteInterface, object, commandExecutor.getServiceManager().getExecutor(), timeout, timeUnit);
}
@Override
public boolean tryExecute(Class remoteInterface, T object, ExecutorService executorService, long timeout, TimeUnit timeUnit) throws InterruptedException {
String requestQueueName = getRequestQueueName(remoteInterface);
RBlockingQueue requestQueue = getBlockingQueue(requestQueueName, StringCodec.INSTANCE);
String requestId = requestQueue.poll(timeout, timeUnit);
if (requestId == null) {
return false;
}
RMap tasks = getMap(((RedissonObject) requestQueue).getRawName() + ":tasks");
RFuture taskFuture = getTask(requestId, tasks);
RemoteServiceRequest request = commandExecutor.getInterrupted(taskFuture);
if (request == null) {
throw new IllegalStateException("Task can't be found for request: " + requestId);
}
RFuture r = executeMethod(remoteInterface, requestQueue, executorService, request, object);
commandExecutor.getInterrupted(r);
return true;
}
@Override
public RFuture tryExecuteAsync(Class remoteInterface, T object, long timeout, TimeUnit timeUnit) {
return tryExecuteAsync(remoteInterface, object, commandExecutor.getServiceManager().getExecutor(), timeout, timeUnit);
}
@Override
public RFuture tryExecuteAsync(Class remoteInterface, T object, ExecutorService executor, long timeout, TimeUnit timeUnit) {
String requestQueueName = getRequestQueueName(remoteInterface);
RBlockingQueue requestQueue = getBlockingQueue(requestQueueName, StringCodec.INSTANCE);
RFuture pollFuture;
if (timeout == -1) {
pollFuture = requestQueue.pollAsync();
} else {
pollFuture = requestQueue.pollAsync(timeout, timeUnit);
}
CompletionStage f = pollFuture.thenCompose(requestId -> {
if (requestId == null) {
return CompletableFuture.completedFuture(false);
}
RMap tasks = getMap(((RedissonObject) requestQueue).getRawName() + ":tasks");
RFuture taskFuture = getTask(requestId, tasks);
return taskFuture.thenCompose(request -> {
if (request == null) {
throw new CompletionException(new IllegalStateException("Task can't be found for request: " + requestId));
}
RFuture future = executeMethod(remoteInterface, requestQueue, executor, request, object);
return future.thenApply(r -> true);
});
});
return new CompletableFutureWrapper<>(f);
}
@Override
public RFuture tryExecuteAsync(Class remoteInterface, T object) {
return tryExecuteAsync(remoteInterface, object, -1, null);
}
@SuppressWarnings("MethodLength")
private void subscribe(Class remoteInterface, RBlockingQueue requestQueue,
ExecutorService executor, Object bean) {
Entry entry = remoteMap.get(remoteInterface);
if (entry == null) {
return;
}
RFuture take = requestQueue.pollAsync(60, TimeUnit.SECONDS);
entry.setFuture(take);
take.whenComplete((requestId, e) -> {
Entry entr = remoteMap.get(remoteInterface);
if (entr == null) {
return;
}
if (e != null) {
if (commandExecutor.getServiceManager().isShuttingDown(e)) {
return;
}
log.error("Can't process the remote service request. A new attempt has been made.", e);
// re-subscribe after a failed takeAsync
commandExecutor.getServiceManager().newTimeout(task -> {
subscribe(remoteInterface, requestQueue, executor, bean);
}, commandExecutor.getServiceManager().getConfig().getRetryInterval(), TimeUnit.MILLISECONDS);
return;
}
// do not subscribe now, see
// https://github.com/mrniko/redisson/issues/493
// subscribe(remoteInterface, requestQueue);
if (entry.getCounter().get() == 0) {
return;
}
if (entry.getCounter().decrementAndGet() > 0) {
subscribe(remoteInterface, requestQueue, executor, bean);
}
// poll method may return null value
if (requestId == null) {
// Because the previous code is already -1, it must be +1 before returning, otherwise the counter will become 0 soon
resubscribe(remoteInterface, requestQueue, executor, bean);
return;
}
RMap tasks = getMap(((RedissonObject) requestQueue).getRawName() + ":tasks");
RFuture taskFuture = getTask(requestId, tasks);
taskFuture.whenComplete((request, exc) -> {
if (exc != null) {
if (commandExecutor.getServiceManager().isShuttingDown(exc)) {
return;
}
log.error("Can't process the remote service request with id {}. Try to increase 'retryInterval' and/or 'retryAttempts' settings", requestId, exc);
// re-subscribe after a failed takeAsync
resubscribe(remoteInterface, requestQueue, executor, bean);
return;
}
if (request == null) {
log.debug("Task can't be found for request: {}", requestId);
// re-subscribe after a skipped ackTimeout
resubscribe(remoteInterface, requestQueue, executor, bean);
return;
}
long elapsedTime = System.currentTimeMillis() - request.getDate();
// check the ack only if expected
if (request.getOptions().isAckExpected() && elapsedTime > request
.getOptions().getAckTimeoutInMillis()) {
log.debug("request: {} has been skipped due to ackTimeout. Elapsed time: {}ms", request.getId(), elapsedTime);
// re-subscribe after a skipped ackTimeout
resubscribe(remoteInterface, requestQueue, executor, bean);
return;
}
// send the ack only if expected
if (request.getOptions().isAckExpected()) {
String responseName = getResponseQueueName(request.getExecutorId());
String ackName = getAckName(request.getId());
RFuture ackClientsFuture = commandExecutor.evalWriteNoRetryAsync(responseName,
LongCodec.INSTANCE, RedisCommands.EVAL_BOOLEAN,
"if redis.call('setnx', KEYS[1], 1) == 1 then "
+ "redis.call('pexpire', KEYS[1], ARGV[1]);"
// + "redis.call('rpush', KEYS[2], ARGV[1]);"
// + "redis.call('pexpire', KEYS[2], ARGV[2]);"
+ "return 1;"
+ "end;"
+ "return 0;",
Arrays.asList(ackName),
request.getOptions().getAckTimeoutInMillis());
// Arrays.asList(ackName, responseName),
// encode(new RemoteServiceAck(request.getId())), request.getOptions().getAckTimeoutInMillis());
ackClientsFuture.whenComplete((r, ex) -> {
if (ex != null) {
if (commandExecutor.getServiceManager().isShuttingDown(ex)) {
return;
}
log.error("Can't send ack for request: {}. Try to increase 'retryInterval' and/or 'retryAttempts' settings", request, ex);
// re-subscribe after a failed send (ack)
resubscribe(remoteInterface, requestQueue, executor, bean);
return;
}
if (!r) {
resubscribe(remoteInterface, requestQueue, executor, bean);
return;
}
RList list = new RedissonList<>(codec, commandExecutor, responseName, null);
RFuture addFuture = list.addAsync(new RemoteServiceAck(request.getId()));
addFuture.whenComplete((res, exce) -> {
if (exce != null) {
if (commandExecutor.getServiceManager().isShuttingDown(exce)) {
return;
}
log.error("Can't send ack for request: {}. Try to increase 'retryInterval' and/or 'retryAttempts' settings", request, exce);
// re-subscribe after a failed send (ack)
resubscribe(remoteInterface, requestQueue, executor, bean);
return;
}
if (!res) {
resubscribe(remoteInterface, requestQueue, executor, bean);
return;
}
executeMethod(remoteInterface, requestQueue, executor, request, bean);
})
.exceptionally(exack -> {
if (commandExecutor.getServiceManager().isShuttingDown(exack)) {
return null;
}
log.error("Can't send ack for request: {}", request, exack);
return null;
});
});
} else {
executeMethod(remoteInterface, requestQueue, executor, request, bean);
}
})
.exceptionally(exc -> {
if (commandExecutor.getServiceManager().isShuttingDown(exc)) {
return null;
}
log.error("Can't process the remote service request with id {}", requestId, exc);
return null;
});
});
}
private final Map methodsCache = new ConcurrentHashMap<>();
private RFuture executeMethod(Class remoteInterface, RBlockingQueue requestQueue,
ExecutorService executor, RemoteServiceRequest request, Object bean) {
RemoteServiceKey key = new RemoteServiceKey(remoteInterface, request.getMethodName(), request.getSignature());
Method rm = methodsCache.computeIfAbsent(key, k -> Arrays.stream(k.getServiceInterface().getMethods())
.filter(m -> m.getName().equals(k.getMethodName())
&& Arrays.equals(getMethodSignature(m), k.getSignature()))
.findFirst().get());
RemoteServiceMethod method = new RemoteServiceMethod(rm, bean);
String responseName = getResponseQueueName(request.getExecutorId());
CompletableFuture responsePromise = new CompletableFuture<>();
CompletableFuture cancelRequestFuture = new CompletableFuture<>();
scheduleCheck(cancelRequestMapName, request.getId(), cancelRequestFuture);
responsePromise.whenComplete((result, e) -> {
if (request.getOptions().isResultExpected()
|| result instanceof RemoteServiceCancelResponse) {
long timeout = 60 * 1000;
if (request.getOptions().getExecutionTimeoutInMillis() != null) {
timeout = request.getOptions().getExecutionTimeoutInMillis();
}
RBlockingQueueAsync queue = getBlockingQueue(responseName, codec);
try {
RRemoteServiceResponse response;
if (result instanceof RemoteServiceResponse
&& ((RemoteServiceResponse) result).getResult() instanceof Optional) {
Optional o = (Optional) ((RemoteServiceResponse) result).getResult();
response = new RemoteServiceResponse(result.getId(), o.orElse(null));
} else {
response = result;
}
RFuture clientsFuture = queue.putAsync(response);
queue.expireAsync(timeout, TimeUnit.MILLISECONDS);
clientsFuture.whenComplete((res, exc) -> {
if (exc != null) {
if (commandExecutor.getServiceManager().isShuttingDown(exc)) {
return;
}
log.error("Can't send response: {} for request: {}. Try to increase 'retryInterval' and/or 'retryAttempts' settings", response, request, exc);
}
resubscribe(remoteInterface, requestQueue, executor, method.getBean());
});
} catch (Exception ex) {
log.error("Can't send response: {} for request: {}", result, request, ex);
}
} else {
resubscribe(remoteInterface, requestQueue, executor, method.getBean());
}
});
java.util.concurrent.Future submitFuture = executor.submit(() -> {
if (commandExecutor.getServiceManager().isShuttingDown()) {
return;
}
invokeMethod(request, method, cancelRequestFuture, responsePromise);
});
cancelRequestFuture.thenAccept(r -> {
boolean res = submitFuture.cancel(r.isMayInterruptIfRunning());
if (res) {
RemoteServiceCancelResponse response = new RemoteServiceCancelResponse(request.getId(), true);
if (!responsePromise.complete(response)) {
response = new RemoteServiceCancelResponse(request.getId(), false);
}
// could be removed not from future object
if (r.isSendResponse()) {
RMap map = getMap(cancelResponseMapName);
map.fastPutAsync(request.getId(), response);
map.expireAsync(60, TimeUnit.SECONDS);
}
}
});
return new CompletableFutureWrapper<>(responsePromise);
}
protected void invokeMethod(RemoteServiceRequest request, RemoteServiceMethod method,
CompletableFuture cancelRequestFuture,
CompletableFuture responsePromise) {
try {
Object result = method.getMethod().invoke(method.getBean(), request.getArgs());
RemoteServiceResponse response = new RemoteServiceResponse(request.getId(), result);
responsePromise.complete(response);
} catch (Exception e) {
RemoteServiceResponse response = new RemoteServiceResponse(request.getId(), e.getCause());
responsePromise.complete(response);
log.error("Can't execute: {}", request, e);
}
if (cancelRequestFuture != null) {
cancelRequestFuture.cancel(false);
}
}
private void resubscribe(Class remoteInterface, RBlockingQueue requestQueue,
ExecutorService executor, Object bean) {
Entry entry = remoteMap.get(remoteInterface);
if (entry != null && entry.getCounter().getAndIncrement() == 0) {
// re-subscribe anyways after the method invocation
subscribe(remoteInterface, requestQueue, executor, bean);
}
}
protected RFuture getTask(String requestId, RMap tasks) {
return tasks.removeAsync(requestId);
}
}
