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org.redisson.BaseRemoteService Maven / Gradle / Ivy
/**
* Copyright 2018 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 java.io.IOException;
import java.lang.annotation.Annotation;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CancellationException;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.TimeUnit;
import org.redisson.api.RBlockingQueue;
import org.redisson.api.RFuture;
import org.redisson.api.RList;
import org.redisson.api.RMap;
import org.redisson.api.RedissonClient;
import org.redisson.api.RemoteInvocationOptions;
import org.redisson.api.annotation.RRemoteAsync;
import org.redisson.client.RedisException;
import org.redisson.client.codec.Codec;
import org.redisson.client.codec.LongCodec;
import org.redisson.client.protocol.RedisCommands;
import org.redisson.command.CommandAsyncExecutor;
import org.redisson.executor.RemotePromise;
import org.redisson.misc.RPromise;
import org.redisson.misc.RedissonPromise;
import org.redisson.remote.RRemoteServiceResponse;
import org.redisson.remote.RemoteServiceAck;
import org.redisson.remote.RemoteServiceAckTimeoutException;
import org.redisson.remote.RemoteServiceCancelRequest;
import org.redisson.remote.RemoteServiceCancelResponse;
import org.redisson.remote.RemoteServiceRequest;
import org.redisson.remote.RemoteServiceResponse;
import org.redisson.remote.RemoteServiceTimeoutException;
import org.redisson.remote.RequestId;
import org.redisson.remote.ResponseEntry;
import org.redisson.remote.ResponseEntry.Result;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import io.netty.buffer.ByteBuf;
import io.netty.util.Timeout;
import io.netty.util.TimerTask;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.FutureListener;
import io.netty.util.concurrent.ScheduledFuture;
import io.netty.util.internal.PlatformDependent;
/**
*
* @author Nikita Koksharov
*
*/
public abstract class BaseRemoteService {
private static final Logger log = LoggerFactory.getLogger(BaseRemoteService.class);
private final Map, String> requestQueueNameCache = PlatformDependent.newConcurrentHashMap();
private final ConcurrentMap> methodSignaturesCache = PlatformDependent.newConcurrentHashMap();
protected final Codec codec;
protected final RedissonClient redisson;
protected final String name;
protected final CommandAsyncExecutor commandExecutor;
protected final String executorId;
protected final String cancelRequestMapName;
protected final String cancelResponseMapName;
protected final String responseQueueName;
private final ConcurrentMap responses;
public BaseRemoteService(Codec codec, RedissonClient redisson, String name, CommandAsyncExecutor commandExecutor, String executorId, ConcurrentMap responses) {
this.codec = codec;
this.redisson = redisson;
this.name = name;
this.commandExecutor = commandExecutor;
this.executorId = executorId;
this.responses = responses;
this.cancelRequestMapName = "{" + name + ":remote" + "}:cancel-request";
this.cancelResponseMapName = "{" + name + ":remote" + "}:cancel-response";
this.responseQueueName = getResponseQueueName(executorId);
}
public String getResponseQueueName(String executorId) {
return "{remote_response}:" + executorId;
}
protected String getAckName(RequestId requestId) {
return "{" + name + ":remote" + "}:" + requestId + ":ack";
}
protected String getAckName(String requestId) {
return "{" + name + ":remote" + "}:" + requestId + ":ack";
}
public String getRequestQueueName(Class remoteInterface) {
String str = requestQueueNameCache.get(remoteInterface);
if (str == null) {
str = "{" + name + ":" + remoteInterface.getName() + "}";
requestQueueNameCache.put(remoteInterface, str);
}
return str;
}
protected ByteBuf encode(Object obj) {
try {
return codec.getValueEncoder().encode(obj);
} catch (IOException e) {
throw new IllegalArgumentException(e);
}
}
public T get(Class remoteInterface) {
return get(remoteInterface, RemoteInvocationOptions.defaults());
}
public T get(Class remoteInterface, long executionTimeout, TimeUnit executionTimeUnit) {
return get(remoteInterface,
RemoteInvocationOptions.defaults().expectResultWithin(executionTimeout, executionTimeUnit));
}
public T get(Class remoteInterface, long executionTimeout, TimeUnit executionTimeUnit, long ackTimeout,
TimeUnit ackTimeUnit) {
return get(remoteInterface, RemoteInvocationOptions.defaults().expectAckWithin(ackTimeout, ackTimeUnit)
.expectResultWithin(executionTimeout, executionTimeUnit));
}
public T get(Class remoteInterface, RemoteInvocationOptions options) {
for (Annotation annotation : remoteInterface.getAnnotations()) {
if (annotation.annotationType() == RRemoteAsync.class) {
Class syncInterface = (Class) ((RRemoteAsync) annotation).value();
for (Method m : remoteInterface.getMethods()) {
try {
syncInterface.getMethod(m.getName(), m.getParameterTypes());
} catch (NoSuchMethodException e) {
throw new IllegalArgumentException("Method '" + m.getName() + "' with params '"
+ Arrays.toString(m.getParameterTypes()) + "' isn't defined in " + syncInterface);
} catch (SecurityException e) {
throw new IllegalArgumentException(e);
}
if (!m.getReturnType().getClass().isInstance(RFuture.class)) {
throw new IllegalArgumentException(
m.getReturnType().getClass() + " isn't allowed as return type");
}
}
return async(remoteInterface, options, syncInterface);
}
}
return sync(remoteInterface, options);
}
private T async(final Class remoteInterface, final RemoteInvocationOptions options,
final Class syncInterface) {
// local copy of the options, to prevent mutation
final RemoteInvocationOptions optionsCopy = new RemoteInvocationOptions(options);
InvocationHandler handler = new InvocationHandler() {
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
final RequestId requestId = generateRequestId();
if (method.getName().equals("toString")) {
return getClass().getSimpleName() + "-" + remoteInterface.getSimpleName() + "-proxy-" + requestId;
} else if (method.getName().equals("equals")) {
return proxy == args[0];
} else if (method.getName().equals("hashCode")) {
return (getClass().getSimpleName() + "-" + remoteInterface.getSimpleName() + "-proxy-" + requestId).hashCode();
}
if (!optionsCopy.isResultExpected() && !(method.getReturnType().equals(Void.class)
|| method.getReturnType().equals(Void.TYPE) || method.getReturnType().equals(RFuture.class))) {
throw new IllegalArgumentException("The noResult option only supports void return value");
}
final String requestQueueName = getRequestQueueName(syncInterface);
final Long ackTimeout = optionsCopy.getAckTimeoutInMillis();
final RemotePromise result = new RemotePromise(requestId) {
@Override
public boolean cancel(boolean mayInterruptIfRunning) {
if (isCancelled()) {
return true;
}
if (isDone()) {
return false;
}
if (optionsCopy.isAckExpected()) {
String ackName = getAckName(requestId);
RFuture future = commandExecutor.evalWriteAsync(responseQueueName, LongCodec.INSTANCE,
RedisCommands.EVAL_BOOLEAN,
"if redis.call('setnx', KEYS[1], 1) == 1 then "
+ "redis.call('pexpire', KEYS[1], ARGV[1]);"
// + "redis.call('lrem', KEYS[3], 1, ARGV[1]);"
// + "redis.call('pexpire', KEYS[2], ARGV[2]);"
+ "return 1;"
+ "end;"
+ "return 0;",
Arrays. asList(ackName),
// Arrays. asList(ackName, responseQueueName, requestQueueName),
ackTimeout);
boolean ackNotSent = commandExecutor.get(future);
if (ackNotSent) {
RList list = redisson.getList(requestQueueName, LongCodec.INSTANCE);
list.remove(requestId.toString());
super.cancel(mayInterruptIfRunning);
return true;
}
return doCancel(mayInterruptIfRunning);
}
boolean removed = commandExecutor.get(removeAsync(requestQueueName, requestId));
if (removed) {
super.cancel(mayInterruptIfRunning);
return true;
}
return doCancel(mayInterruptIfRunning);
}
private boolean doCancel(boolean mayInterruptIfRunning) {
if (isCancelled()) {
return true;
}
if (isDone()) {
return false;
}
cancelExecution(optionsCopy, mayInterruptIfRunning, this);
try {
awaitUninterruptibly(60, TimeUnit.SECONDS);
} catch (CancellationException e) {
// skip
}
return isCancelled();
}
};
RemoteServiceRequest request = new RemoteServiceRequest(executorId, requestId.toString(), method.getName(), getMethodSignatures(method), args,
optionsCopy, System.currentTimeMillis());
final RFuture ackFuture;
if (optionsCopy.isAckExpected()) {
ackFuture = poll(optionsCopy.getAckTimeoutInMillis(), requestId, false);
} else {
ackFuture = null;
}
final RPromise responseFuture;
if (optionsCopy.isResultExpected()) {
responseFuture = poll(optionsCopy.getExecutionTimeoutInMillis(), requestId, false);
} else {
responseFuture = null;
}
RFuture addFuture = addAsync(requestQueueName, request, result);
addFuture.addListener(new FutureListener() {
@Override
public void operationComplete(Future future) throws Exception {
if (!future.isSuccess()) {
if (responseFuture != null) {
responseFuture.cancel(false);
}
if (ackFuture != null) {
ackFuture.cancel(false);
}
result.tryFailure(future.cause());
return;
}
if (!future.get()) {
result.tryFailure(new RedisException("Task hasn't been added"));
if (responseFuture != null) {
responseFuture.cancel(false);
}
if (ackFuture != null) {
ackFuture.cancel(false);
}
return;
}
if (optionsCopy.isAckExpected()) {
ackFuture.addListener(new FutureListener() {
@Override
public void operationComplete(Future future) throws Exception {
if (!future.isSuccess()) {
if (responseFuture != null) {
responseFuture.cancel(false);
}
result.tryFailure(future.cause());
return;
}
RemoteServiceAck ack = future.getNow();
if (ack == null) {
final String ackName = getAckName(requestId);
RFuture ackFutureAttempt =
tryPollAckAgainAsync(optionsCopy, ackName, requestId);
ackFutureAttempt.addListener(new FutureListener() {
@Override
public void operationComplete(Future future)
throws Exception {
if (!future.isSuccess()) {
result.tryFailure(future.cause());
return;
}
if (future.getNow() == null) {
Exception ex = new RemoteServiceAckTimeoutException(
"No ACK response after "
+ optionsCopy.getAckTimeoutInMillis()
+ "ms for request: " + requestId);
result.tryFailure(ex);
return;
}
awaitResultAsync(optionsCopy, result, ackName, responseFuture);
}
});
} else {
awaitResultAsync(optionsCopy, result, responseFuture);
}
}
});
} else {
awaitResultAsync(optionsCopy, result, responseFuture);
}
}
});
return result;
}
};
return (T) Proxy.newProxyInstance(remoteInterface.getClassLoader(), new Class[] { remoteInterface }, handler);
}
private void awaitResultAsync(final RemoteInvocationOptions optionsCopy, final RemotePromise result,
final String ackName, final RFuture responseFuture) {
RFuture deleteFuture = redisson.getBucket(ackName).deleteAsync();
deleteFuture.addListener(new FutureListener() {
@Override
public void operationComplete(Future future) throws Exception {
if (!future.isSuccess()) {
result.tryFailure(future.cause());
return;
}
awaitResultAsync(optionsCopy, result, responseFuture);
}
});
}
protected void awaitResultAsync(final RemoteInvocationOptions optionsCopy, final RemotePromise result,
RFuture responseFuture) {
// poll for the response only if expected
if (!optionsCopy.isResultExpected()) {
return;
}
responseFuture.addListener(new FutureListener() {
@Override
public void operationComplete(Future future) throws Exception {
if (!future.isSuccess()) {
result.tryFailure(future.cause());
return;
}
if (future.getNow() == null) {
RemoteServiceTimeoutException e = new RemoteServiceTimeoutException("No response after "
+ optionsCopy.getExecutionTimeoutInMillis() + "ms for request: " + result.getRequestId());
result.tryFailure(e);
return;
}
if (future.getNow() instanceof RemoteServiceCancelResponse) {
result.doCancel();
return;
}
RemoteServiceResponse response = (RemoteServiceResponse) future.getNow();
if (response.getError() != null) {
result.tryFailure(response.getError());
return;
}
result.trySuccess(response.getResult());
}
});
}
private RPromise poll(final long timeout,
final RequestId requestId, boolean insertFirst) {
final RPromise responseFuture = new RedissonPromise();
ResponseEntry entry;
synchronized (responses) {
entry = responses.get(responseQueueName);
if (entry == null) {
entry = new ResponseEntry();
ResponseEntry oldEntry = responses.putIfAbsent(responseQueueName, entry);
if (oldEntry != null) {
entry = oldEntry;
}
}
responseFuture.addListener(new FutureListener() {
@Override
public void operationComplete(Future future) throws Exception {
if (future.isCancelled()) {
synchronized (responses) {
ResponseEntry entry = responses.get(responseQueueName);
List list = entry.getResponses().get(requestId);
if (list == null) {
return;
}
for (Iterator iterator = list.iterator(); iterator.hasNext();) {
Result result = iterator.next();
if (result.getPromise() == responseFuture) {
result.getScheduledFuture().cancel(true);
iterator.remove();
}
}
if (list.isEmpty()) {
entry.getResponses().remove(requestId);
}
if (entry.getResponses().isEmpty()) {
responses.remove(responseQueueName, entry);
}
}
}
}
});
ScheduledFuture future = commandExecutor.getConnectionManager().getGroup().schedule(new Runnable() {
@Override
public void run() {
synchronized (responses) {
ResponseEntry entry = responses.get(responseQueueName);
if (entry == null) {
return;
}
RemoteServiceTimeoutException ex = new RemoteServiceTimeoutException("No response after " + timeout + "ms");
if (responseFuture.tryFailure(ex)) {
List list = entry.getResponses().get(requestId);
list.remove(0);
if (list.isEmpty()) {
entry.getResponses().remove(requestId);
}
if (entry.getResponses().isEmpty()) {
responses.remove(responseQueueName, entry);
}
}
}
}
}, timeout, TimeUnit.MILLISECONDS);
final Map> entryResponses = entry.getResponses();
List list = entryResponses.get(requestId);
if (list == null) {
list = new ArrayList(3);
entryResponses.put(requestId, list);
}
Result res = new Result(responseFuture, future);
if (insertFirst) {
list.add(0, res);
} else {
list.add(res);
}
}
pollTasks(entry);
return responseFuture;
}
private void pollTasks(final ResponseEntry entry) {
if (!entry.getStarted().compareAndSet(false, true)) {
return;
}
RBlockingQueue responseQueue = redisson.getBlockingQueue(responseQueueName, codec);
RFuture future = responseQueue.takeAsync();
future.addListener(new FutureListener() {
@Override
public void operationComplete(Future future) throws Exception {
if (!future.isSuccess()) {
log.error("Can't get response from " + responseQueueName, future.cause());
return;
}
RRemoteServiceResponse response = future.getNow();
RPromise promise;
synchronized (responses) {
ResponseEntry entry = responses.get(responseQueueName);
if (entry == null) {
return;
}
RequestId key = new RequestId(response.getId());
List list = entry.getResponses().get(key);
if (list == null) {
RBlockingQueue responseQueue = redisson.getBlockingQueue(responseQueueName, codec);
responseQueue.takeAsync().addListener(this);
return;
}
Result res = list.remove(0);
if (list.isEmpty()) {
entry.getResponses().remove(key);
}
promise = res.getPromise();
res.getScheduledFuture().cancel(true);
if (entry.getResponses().isEmpty()) {
responses.remove(responseQueueName, entry);
} else {
RBlockingQueue responseQueue = redisson.getBlockingQueue(responseQueueName, codec);
responseQueue.takeAsync().addListener(this);
}
}
if (promise != null) {
promise.trySuccess(response);
}
}
});
}
private T sync(final Class remoteInterface, final RemoteInvocationOptions options) {
// local copy of the options, to prevent mutation
final RemoteInvocationOptions optionsCopy = new RemoteInvocationOptions(options);
final String toString = getClass().getSimpleName() + "-" + remoteInterface.getSimpleName() + "-proxy-"
+ generateRequestId();
InvocationHandler handler = new InvocationHandler() {
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
if (method.getName().equals("toString")) {
return toString;
} else if (method.getName().equals("equals")) {
return proxy == args[0];
} else if (method.getName().equals("hashCode")) {
return toString.hashCode();
}
if (!optionsCopy.isResultExpected()
&& !(method.getReturnType().equals(Void.class) || method.getReturnType().equals(Void.TYPE)))
throw new IllegalArgumentException("The noResult option only supports void return value");
RequestId requestId = generateRequestId();
String requestQueueName = getRequestQueueName(remoteInterface);
RemotePromise addPromise = new RemotePromise(requestId);
RemoteServiceRequest request = new RemoteServiceRequest(executorId, requestId.toString(), method.getName(), getMethodSignatures(method), args, optionsCopy,
System.currentTimeMillis());
final RFuture ackFuture;
if (optionsCopy.isAckExpected()) {
ackFuture = poll(optionsCopy.getAckTimeoutInMillis(), requestId, false);
} else {
ackFuture = null;
}
final RPromise responseFuture;
if (optionsCopy.isResultExpected()) {
responseFuture = poll(optionsCopy.getExecutionTimeoutInMillis(), requestId, false);
} else {
responseFuture = null;
}
RFuture futureAdd = addAsync(requestQueueName, request, addPromise);
futureAdd.await();
if (!futureAdd.isSuccess()) {
if (responseFuture != null) {
responseFuture.cancel(false);
}
if (ackFuture != null) {
ackFuture.cancel(false);
}
throw futureAdd.cause();
}
if (!futureAdd.get()) {
if (responseFuture != null) {
responseFuture.cancel(false);
}
if (ackFuture != null) {
ackFuture.cancel(false);
}
throw new RedisException("Task hasn't been added");
}
// poll for the ack only if expected
if (ackFuture != null) {
String ackName = getAckName(requestId);
ackFuture.await();
RemoteServiceAck ack = ackFuture.getNow();
if (ack == null) {
RFuture ackFutureAttempt =
tryPollAckAgainAsync(optionsCopy, ackName, requestId);
ackFutureAttempt.await();
ack = ackFutureAttempt.getNow();
if (ack == null) {
throw new RemoteServiceAckTimeoutException("No ACK response after "
+ optionsCopy.getAckTimeoutInMillis() + "ms for request: " + request);
}
}
redisson.getBucket(ackName).delete();
}
// poll for the response only if expected
if (responseFuture != null) {
responseFuture.awaitUninterruptibly();
RemoteServiceResponse response = (RemoteServiceResponse) responseFuture.getNow();
if (response == null) {
throw new RemoteServiceTimeoutException("No response after "
+ optionsCopy.getExecutionTimeoutInMillis() + "ms for request: " + request);
}
if (response.getError() != null) {
throw response.getError();
}
return response.getResult();
}
return null;
}
};
return (T) Proxy.newProxyInstance(remoteInterface.getClassLoader(), new Class[] { remoteInterface }, handler);
}
private RFuture tryPollAckAgainAsync(final RemoteInvocationOptions optionsCopy,
String ackName, final RequestId requestId) {
final RPromise promise = new RedissonPromise();
RFuture ackClientsFuture = commandExecutor.evalWriteAsync(ackName, LongCodec.INSTANCE, RedisCommands.EVAL_BOOLEAN,
"if redis.call('setnx', KEYS[1], 1) == 1 then "
+ "redis.call('pexpire', KEYS[1], ARGV[1]);"
+ "return 0;"
+ "end;"
+ "redis.call('del', KEYS[1]);"
+ "return 1;",
Arrays. asList(ackName), optionsCopy.getAckTimeoutInMillis());
ackClientsFuture.addListener(new FutureListener() {
@Override
public void operationComplete(Future future) throws Exception {
if (!future.isSuccess()) {
promise.tryFailure(future.cause());
return;
}
if (future.getNow()) {
RPromise ackFuture = poll(commandExecutor.getConnectionManager().getConfig().getTimeout(), requestId, true);
ackFuture.addListener(new FutureListener() {
@Override
public void operationComplete(Future future) throws Exception {
if (!future.isSuccess()) {
promise.tryFailure(future.cause());
return;
}
promise.trySuccess(future.getNow());
}
});
} else {
promise.trySuccess(null);
}
}
});
return promise;
}
protected void scheduleCheck(final String mapName, final RequestId requestId, final RPromise cancelRequest) {
commandExecutor.getConnectionManager().newTimeout(new TimerTask() {
@Override
public void run(Timeout timeout) throws Exception {
if (cancelRequest.isDone()) {
return;
}
RMap canceledRequests = redisson.getMap(mapName, codec);
RFuture future = canceledRequests.getAsync(requestId.toString());
future.addListener(new FutureListener() {
@Override
public void operationComplete(Future future) throws Exception {
if (cancelRequest.isDone()) {
return;
}
if (!future.isSuccess()) {
scheduleCheck(mapName, requestId, cancelRequest);
return;
}
T request = future.getNow();
if (request == null) {
scheduleCheck(mapName, requestId, cancelRequest);
} else {
cancelRequest.trySuccess(request);
}
}
});
}
}, 3000, TimeUnit.MILLISECONDS);
}
protected RequestId generateRequestId() {
byte[] id = new byte[16];
// TODO JDK UPGRADE replace to native ThreadLocalRandom
PlatformDependent.threadLocalRandom().nextBytes(id);
return new RequestId(id);
}
protected abstract RFuture addAsync(String requestQueueName, RemoteServiceRequest request,
RemotePromise result);
protected abstract RFuture removeAsync(String requestQueueName, RequestId taskId);
private void cancelExecution(RemoteInvocationOptions optionsCopy,
boolean mayInterruptIfRunning, RemotePromise remotePromise) {
RMap canceledRequests = redisson.getMap(cancelRequestMapName, codec);
canceledRequests.putAsync(remotePromise.getRequestId().toString(), new RemoteServiceCancelRequest(mayInterruptIfRunning, false));
canceledRequests.expireAsync(60, TimeUnit.SECONDS);
// subscribe for async result if it's not expected before
if (!optionsCopy.isResultExpected()) {
RemoteInvocationOptions options = new RemoteInvocationOptions(optionsCopy);
options.expectResultWithin(60, TimeUnit.SECONDS);
RFuture responseFuture = poll(options.getExecutionTimeoutInMillis(), remotePromise.getRequestId(), false);
awaitResultAsync(options, remotePromise, responseFuture);
}
}
protected List getMethodSignatures(Method method) {
List result = methodSignaturesCache.get(method);
if (result == null) {
result = new ArrayList(method.getParameterTypes().length);
for (Class t : method.getParameterTypes()) {
result.add(t.getName());
}
List oldList = methodSignaturesCache.putIfAbsent(method, result);
if (oldList != null) {
result = oldList;
}
}
return result;
}
}
