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rpc.turbo.transport.client.ConnectorContext Maven / Gradle / Ivy
package rpc.turbo.transport.client;
import java.io.Closeable;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.Semaphore;
import java.util.stream.IntStream;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import io.netty.channel.EventLoopGroup;
import rpc.turbo.annotation.TurboService;
import rpc.turbo.common.RemoteContext;
import rpc.turbo.common.TurboConnectService;
import rpc.turbo.config.HostPort;
import rpc.turbo.config.client.AppConfig;
import rpc.turbo.filter.RpcClientFilter;
import rpc.turbo.invoke.Invoker;
import rpc.turbo.invoke.InvokerUtils;
import rpc.turbo.loadbalance.Weightable;
import rpc.turbo.param.EmptyMethodParam;
import rpc.turbo.param.MethodParam;
import rpc.turbo.protocol.Request;
import rpc.turbo.protocol.Response;
import rpc.turbo.protocol.ResponseStatus;
import rpc.turbo.remote.RemoteException;
import rpc.turbo.serialization.Serializer;
import rpc.turbo.transport.client.future.ResponseFutureContainer;
import rpc.turbo.util.concurrent.AtomicMuiltInteger;
import rpc.turbo.util.concurrent.ConcurrentIntToIntArrayMap;
import rpc.turbo.util.concurrent.ConcurrentIntegerSequencer;
final class ConnectorContext implements Weightable, Closeable {
private static final Log logger = LogFactory.getLog(ConnectorContext.class);
private final AppConfig appConfig;
public final HostPort serverAddress;
private final int connectCount;
private final ResponseFutureContainer futureContainer = new ResponseFutureContainer();
private final NettyClientConnector connector;
private final ConcurrentIntegerSequencer sequencer = new ConcurrentIntegerSequencer(0, true);
private final Semaphore requestWaitSemaphore;
private final AtomicMuiltInteger errorCounter;
private final int globalTimeout;
private final CopyOnWriteArrayList filters;
private final Method heartbeatMethod;
private final String heartbeatServiceMethodName;
private final ConcurrentIntToIntArrayMap methodIdToServiceIdMap = new ConcurrentIntToIntArrayMap();
private volatile Map serviceMethodNameToServiceIdMap;
private volatile int weight;
private volatile boolean isClosed = false;
ConnectorContext(EventLoopGroup eventLoopGroup, AppConfig appConfig, Serializer serializer,
CopyOnWriteArrayList filters, HostPort serverAddress) {
this.appConfig = appConfig;
this.connectCount = appConfig.getConnectPerServer();
this.connector = new NettyClientConnector(eventLoopGroup, serializer, futureContainer, serverAddress,
connectCount);
this.serverAddress = serverAddress;
this.errorCounter = new AtomicMuiltInteger(connectCount);
this.requestWaitSemaphore = new Semaphore(appConfig.getMaxRequestWait());
this.globalTimeout = appConfig.getGlobalTimeout();
this.filters = filters;
try {
heartbeatMethod = TurboConnectService.class.getDeclaredMethod("heartbeat");
heartbeatServiceMethodName = InvokerUtils.getServiceMethodName(appConfig.getGroup(), appConfig.getApp(),
heartbeatMethod);
} catch (Exception e) {
throw new RemoteException("error on init", e);
}
}
boolean isSupport(String serviceMethodName) {
if (serviceMethodNameToServiceIdMap == null) {
return false;
}
return serviceMethodNameToServiceIdMap.containsKey(serviceMethodName);
}
boolean heartbeat() {
return IntStream//
.range(0, connector.connectCount())//
.mapToObj(index -> {
int requestId = sequencer.next();
Request request = new Request();
request.setServiceId(TurboConnectService.SERVICE_HEARTBEAT);
request.setRequestId(requestId);
CompletableFuture future = new CompletableFuture<>();
futureContainer.addFuture(requestId, future, TurboService.DEFAULT_TIME_OUT);
try {
requestWaitSemaphore.acquire();
boolean allowSend = doRequestFilter(request, heartbeatMethod, heartbeatServiceMethodName);
if (allowSend) {
connector.send(index, request);
} else {
future.completeExceptionally(new RemoteException(RpcClientFilter.CLIENT_FILTER_DENY, false));
}
} catch (Exception e) {
future.completeExceptionally(e);
}
CompletableFuture result = handleResult(request, future);
return result;
})//
.allMatch(future -> {
try {
return future.join();
} catch (Throwable e) {
if (logger.isWarnEnabled()) {
logger.warn(serverAddress + " heartbeat error", e);
}
return false;
}
});
}
/**
* 远程调用，无参，无失败回退
*
* @param serviceId
* 远程serviceId
* @param timeout
* millseconds
* @return
*/
CompletableFuture execute(int serviceId, long timeout) {
return execute(serviceId, timeout, null, null);
}
/**
* 远程调用
*
* @param serviceId
* 远程serviceId
* @param timeout
* millseconds
* @param methodParam
* 方法参数对象，无参类型为null
* @param failoverInvoker
* 失败回退
* @return
*/
CompletableFuture execute(int serviceId, long timeout, MethodParam methodParam,
Invoker> failoverInvoker) {
if (isClosed) {
throw new RemoteException("已关闭的连接!");
}
int requestId = sequencer.next();
for (int i = 0; i < connectCount; i++) {// 最多循环一遍
if (isZombie(channelIndex(requestId))) {
requestId = sequencer.next();
continue;
}
if (isZombie()) {
throw new RemoteException("this connector is zombie");
}
break;
}
Request request = new Request();
request.setServiceId(serviceId);
request.setRequestId(requestId);
if (methodParam instanceof EmptyMethodParam) {
request.setMethodParam(null);
} else {
request.setMethodParam(methodParam);
}
if (globalTimeout > 0) {
timeout = globalTimeout;
}
CompletableFuture future = new CompletableFuture<>();
futureContainer.addFuture(requestId, future, timeout);
try {
requestWaitSemaphore.acquire();
boolean allowSend = doRequestFilter(request);
if (allowSend) {
connector.send(channelIndex(request), request);
} else {
future.completeExceptionally(new RemoteException(RpcClientFilter.CLIENT_FILTER_DENY, false));
}
} catch (Exception e) {
future.completeExceptionally(e);
}
if (failoverInvoker == null) {
return handleResult(request, future);
} else {
return handleResult(request, future, failoverInvoker, methodParam);
}
}
private int channelIndex(int requestId) {
return requestId % connectCount;
}
private int channelIndex(Request request) {
return channelIndex(request.getRequestId());
}
/**
* 处理返回值，无失败回退
*
* @param request
* @param future
* @return
*/
@SuppressWarnings("unchecked")
private CompletableFuture handleResult(final Request request, final CompletableFuture future) {
final Method method;
final String serviceMethodName;
if (filters.size() == 0) {
method = null;
serviceMethodName = null;
} else {
method = RemoteContext.getRemoteMethod();
serviceMethodName = RemoteContext.getServiceMethodName();
}
return future.handle((response, throwable) -> {
requestWaitSemaphore.release();
boolean error = false;
if (throwable != null) {
if (logger.isWarnEnabled()) {
logger.warn("request error, requestId: " + request.getRequestId(), throwable);
}
error = true;
}
if (!error && response == null) {
String msg = "request error, requestId: " + request.getRequestId();
if (logger.isWarnEnabled()) {
logger.warn(msg);
}
error = true;
}
if (!error && response.getStatusCode() != ResponseStatus.OK) {
String msg = " status code is" + response.getStatusCode() + " reason is " + response.getResult();
if (logger.isWarnEnabled()) {
logger.warn(msg);
}
error = true;
}
doResponseFilter(request, response, method, serviceMethodName, throwable);
int channelIndex = channelIndex(request);
if (error) {
errorCounter.incrementAndGet(channelIndex);
futureContainer.remove(request.getRequestId());
return null;
} else {
errorCounter.reset(channelIndex);
return (T) response.getResult();
}
});
}
/**
* 处理返回值，带失败回退
*
* @param request
* @param future
* @param failoverInvoker
* @param methodParam
* @return
*/
@SuppressWarnings("unchecked")
private CompletableFuture handleResult(//
final Request request, //
final CompletableFuture future, //
final Invoker> failoverInvoker, //
final MethodParam methodParam) {
final Method method;
final String serviceMethodName;
if (filters.size() == 0) {
method = null;
serviceMethodName = null;
} else {
method = RemoteContext.getRemoteMethod();
serviceMethodName = RemoteContext.getServiceMethodName();
}
CompletableFuture futureWithFailover = new CompletableFuture<>();
future.whenComplete((response, throwable) -> {
requestWaitSemaphore.release();
boolean error = false;
if (throwable != null) {
if (logger.isWarnEnabled()) {
logger.warn("request error, requestId: " + request.getRequestId(), throwable);
}
error = true;
}
if (!error && response == null) {
if (logger.isWarnEnabled()) {
logger.warn("request error, requestId: " + request.getRequestId());
}
error = true;
}
if (!error && response.getStatusCode() != ResponseStatus.OK) {
String msg = " status code is" + response.getStatusCode() + " reason is " + response.getResult();
if (logger.isWarnEnabled()) {
logger.warn("request error, requestId: " + request.getRequestId() + msg);
}
error = true;
}
doResponseFilter(request, response, method, serviceMethodName, throwable);
int channelIndex = channelIndex(request);
if (error) {
if (logger.isInfoEnabled()) {
logger.info("远程调用发生错误，使用本地回退方法执行");
}
errorCounter.incrementAndGet(channelIndex);
futureContainer.remove(request.getRequestId());
failoverInvoker.invoke(methodParam).whenComplete((r, t) -> {
if (t != null) {
futureWithFailover.completeExceptionally(t);
} else {
futureWithFailover.complete((T) r);
}
});
} else {
errorCounter.reset(channelIndex);
futureWithFailover.complete((T) response.getResult());
}
});
return futureWithFailover;
}
private boolean doRequestFilter(Request request) {
final int filterLength = filters.size();
if (filterLength == 0) {
return true;
}
RemoteContext.setServerAddress(connector.serverAddress);
RemoteContext.setClientAddress(connector.clientAddress);
// App中赋值 RemoteContext.setRemoteMethod(method);
// RemoteContext.setServiceMethodName(serviceMethodName);
for (int i = 0; i < filterLength; i++) {
RpcClientFilter filter = filters.get(i);
if (!filter.onSend(request)) {
return false;
}
}
return true;
}
private boolean doRequestFilter(Request request, Method method, String serviceMethodName) {
final int filterLength = filters.size();
if (filterLength == 0) {
return true;
}
RemoteContext.setServerAddress(connector.serverAddress);
RemoteContext.setClientAddress(connector.clientAddress);
RemoteContext.setRemoteMethod(method);
RemoteContext.setServiceMethodName(serviceMethodName);
for (int i = 0; i < filterLength; i++) {
RpcClientFilter filter = filters.get(i);
if (!filter.onSend(request)) {
return false;
}
}
return true;
}
private void doResponseFilter(Request request, Response response, Method method, String serviceMethodName,
Throwable throwable) {
final int filterLength = filters.size();
if (filterLength == 0) {
return;
}
RemoteContext.setServerAddress(connector.serverAddress);
RemoteContext.setClientAddress(connector.clientAddress);
RemoteContext.setRemoteMethod(method);
RemoteContext.setServiceMethodName(serviceMethodName);
if (response.getStatusCode() == ResponseStatus.OK) {
for (int i = 0; i < filterLength; i++) {
RpcClientFilter filter = filters.get(i);
filter.onRecive(request, response);
}
} else {
for (int i = 0; i < filterLength; i++) {
RpcClientFilter filter = filters.get(i);
filter.onError(request, response, throwable);
}
}
}
int getServiceId(int methodId) {
return methodIdToServiceIdMap.get(methodId);
}
void putServiceId(String serviceMethodName, int methodId) {
Integer serviceId = serviceMethodNameToServiceIdMap.get(serviceMethodName);
if (serviceId == null) {
return;
}
methodIdToServiceIdMap.put(methodId, serviceId);
}
void clear() {
methodIdToServiceIdMap.clear();
}
public void setServiceMethodNameToServiceIdMap(Map serviceMethodNameToServiceIdMap) {
this.serviceMethodNameToServiceIdMap = serviceMethodNameToServiceIdMap;
}
public void setWeight(int weight) {
this.weight = weight;
}
void doExpireJob() {
futureContainer.doExpireJob();
}
boolean isZombie() {
int sum = 0;
boolean allZombie = true;
for (int i = 0; i < connectCount; i++) {
int error = errorCounter.get(i);
sum += error;
if (error < appConfig.getConnectErrorThreshold()) {
allZombie = false;
}
}
return sum >= appConfig.getServerErrorThreshold() || allZombie;
}
/**
*
* @param index
* @return
*/
private boolean isZombie(int index) {
return errorCounter.get(index) >= appConfig.getConnectErrorThreshold();
}
void connect() throws InterruptedException {
connector.connect();
errorCounter.resetAll();
}
@Override
public int weight() {
return weight;
}
public boolean isClosed() {
return isClosed;
}
@Override
public void close() throws IOException {
if (isClosed) {
return;
}
isClosed = true;
futureContainer.close();
connector.close();
}
}
