Search in sources :

Example 1 with LoadBalancerCommand

use of com.netflix.loadbalancer.reactive.LoadBalancerCommand in project java-chassis by ServiceComb.

the class LoadbalanceHandler method sendWithRetry.

private void sendWithRetry(Invocation invocation, AsyncResponse asyncResp, final LoadBalancer choosenLB) throws Exception {
    long time = System.currentTimeMillis();
    // retry in loadbalance, 2.0 feature
    final int currentHandler = invocation.getHandlerIndex();
    final SyncResponseExecutor orginExecutor;
    final Executor newExecutor;
    if (invocation.getResponseExecutor() instanceof SyncResponseExecutor) {
        orginExecutor = (SyncResponseExecutor) invocation.getResponseExecutor();
        newExecutor = new Executor() {

            @Override
            public void execute(Runnable command) {
                // retry的场景,对于同步调用, 需要在网络线程中进行。同步调用的主线程已经被挂起,无法再主线程中进行重试。
                command.run();
            }
        };
        invocation.setResponseExecutor(newExecutor);
    } else {
        orginExecutor = null;
        newExecutor = null;
    }
    ExecutionListener<Invocation, Response> listener = new ExecutionListener<Invocation, Response>() {

        @Override
        public void onExecutionStart(ExecutionContext<Invocation> context) throws AbortExecutionException {
        }

        @Override
        public void onStartWithServer(ExecutionContext<Invocation> context, ExecutionInfo info) throws AbortExecutionException {
        }

        @Override
        public void onExceptionWithServer(ExecutionContext<Invocation> context, Throwable exception, ExecutionInfo info) {
            LOGGER.error("onExceptionWithServer msg {}; server {}", exception.getMessage(), context.getRequest().getEndpoint());
        }

        @Override
        public void onExecutionSuccess(ExecutionContext<Invocation> context, Response response, ExecutionInfo info) {
            if (orginExecutor != null) {
                orginExecutor.execute(() -> {
                    asyncResp.complete(response);
                });
            } else {
                asyncResp.complete(response);
            }
        }

        @Override
        public void onExecutionFailed(ExecutionContext<Invocation> context, Throwable finalException, ExecutionInfo info) {
            if (orginExecutor != null) {
                orginExecutor.execute(() -> {
                    asyncResp.consumerFail(finalException);
                });
            } else {
                asyncResp.consumerFail(finalException);
            }
        }
    };
    List<ExecutionListener<Invocation, Response>> listeners = new ArrayList<>(0);
    listeners.add(listener);
    ExecutionContext<Invocation> context = new ExecutionContext<>(invocation, null, null, null);
    LoadBalancerCommand<Response> command = LoadBalancerCommand.<Response>builder().withLoadBalancer(choosenLB).withServerLocator(invocation).withRetryHandler(new DefaultLoadBalancerRetryHandler(Configuration.INSTANCE.getRetryOnSame(invocation.getMicroserviceName()), Configuration.INSTANCE.getRetryOnNext(invocation.getMicroserviceName()), true)).withListeners(listeners).withExecutionContext(context).build();
    Observable<Response> observable = command.submit(new ServerOperation<Response>() {

        public Observable<Response> call(Server s) {
            return Observable.create(f -> {
                try {
                    ((CseServer) s).setLastVisitTime(time);
                    choosenLB.getLoadBalancerStats().incrementNumRequests(s);
                    invocation.setHandlerIndex(currentHandler);
                    invocation.setEndpoint(((CseServer) s).getEndpoint());
                    invocation.next(resp -> {
                        if (resp.isFailed()) {
                            LOGGER.error("service call error, msg is {}, server is {} ", ((Throwable) resp.getResult()).getMessage(), s);
                            choosenLB.getLoadBalancerStats().incrementSuccessiveConnectionFailureCount(s);
                            f.onError(resp.getResult());
                        } else {
                            choosenLB.getLoadBalancerStats().incrementActiveRequestsCount(s);
                            choosenLB.getLoadBalancerStats().noteResponseTime(s, (System.currentTimeMillis() - time));
                            f.onNext(resp);
                            f.onCompleted();
                        }
                    });
                } catch (Exception e) {
                    LOGGER.error("execution error, msg is " + e.getMessage());
                    f.onError(e);
                }
            });
        }
    });
    observable.subscribe(response -> {
    }, error -> {
    }, () -> {
    });
}
Also used : DefaultLoadBalancerRetryHandler(com.netflix.client.DefaultLoadBalancerRetryHandler) RoundRobinRule(com.netflix.loadbalancer.RoundRobinRule) LoggerFactory(org.slf4j.LoggerFactory) ExceptionUtils(io.servicecomb.core.exception.ExceptionUtils) SyncResponseExecutor(io.servicecomb.core.provider.consumer.SyncResponseExecutor) ArrayList(java.util.ArrayList) Observable(rx.Observable) IsolationServerListFilter(io.servicecomb.loadbalance.filter.IsolationServerListFilter) Map(java.util.Map) AbstractHandler(io.servicecomb.core.handler.impl.AbstractHandler) LoadBalancerCommand(com.netflix.loadbalancer.reactive.LoadBalancerCommand) Logger(org.slf4j.Logger) ExecutionListener(com.netflix.loadbalancer.reactive.ExecutionListener) Executor(java.util.concurrent.Executor) Server(com.netflix.loadbalancer.Server) ConcurrentHashMap(java.util.concurrent.ConcurrentHashMap) AsyncResponse(io.servicecomb.core.AsyncResponse) TransactionControlFilter(io.servicecomb.loadbalance.filter.TransactionControlFilter) ExecutionContext(com.netflix.loadbalancer.reactive.ExecutionContext) List(java.util.List) IRule(com.netflix.loadbalancer.IRule) ExecutionInfo(com.netflix.loadbalancer.reactive.ExecutionInfo) Response(io.servicecomb.core.Response) ServerOperation(com.netflix.loadbalancer.reactive.ServerOperation) Invocation(io.servicecomb.core.Invocation) Invocation(io.servicecomb.core.Invocation) Server(com.netflix.loadbalancer.Server) SyncResponseExecutor(io.servicecomb.core.provider.consumer.SyncResponseExecutor) ArrayList(java.util.ArrayList) ExecutionInfo(com.netflix.loadbalancer.reactive.ExecutionInfo) ExecutionListener(com.netflix.loadbalancer.reactive.ExecutionListener) SyncResponseExecutor(io.servicecomb.core.provider.consumer.SyncResponseExecutor) Executor(java.util.concurrent.Executor) DefaultLoadBalancerRetryHandler(com.netflix.client.DefaultLoadBalancerRetryHandler) Observable(rx.Observable) AsyncResponse(io.servicecomb.core.AsyncResponse) Response(io.servicecomb.core.Response) ExecutionContext(com.netflix.loadbalancer.reactive.ExecutionContext)

Aggregations

DefaultLoadBalancerRetryHandler (com.netflix.client.DefaultLoadBalancerRetryHandler)1 IRule (com.netflix.loadbalancer.IRule)1 RoundRobinRule (com.netflix.loadbalancer.RoundRobinRule)1 Server (com.netflix.loadbalancer.Server)1 ExecutionContext (com.netflix.loadbalancer.reactive.ExecutionContext)1 ExecutionInfo (com.netflix.loadbalancer.reactive.ExecutionInfo)1 ExecutionListener (com.netflix.loadbalancer.reactive.ExecutionListener)1 LoadBalancerCommand (com.netflix.loadbalancer.reactive.LoadBalancerCommand)1 ServerOperation (com.netflix.loadbalancer.reactive.ServerOperation)1 AsyncResponse (io.servicecomb.core.AsyncResponse)1 Invocation (io.servicecomb.core.Invocation)1 Response (io.servicecomb.core.Response)1 ExceptionUtils (io.servicecomb.core.exception.ExceptionUtils)1 AbstractHandler (io.servicecomb.core.handler.impl.AbstractHandler)1 SyncResponseExecutor (io.servicecomb.core.provider.consumer.SyncResponseExecutor)1 IsolationServerListFilter (io.servicecomb.loadbalance.filter.IsolationServerListFilter)1 TransactionControlFilter (io.servicecomb.loadbalance.filter.TransactionControlFilter)1 ArrayList (java.util.ArrayList)1 List (java.util.List)1 Map (java.util.Map)1