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AgentClientMock.java
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AgentClientMock.java
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/*
* Copyright 2019 NAVER Corp.
*
* 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 com.navercorp.pinpoint.collector.receiver.grpc;
import com.navercorp.pinpoint.grpc.AgentHeaderFactory;
import com.navercorp.pinpoint.grpc.HeaderFactory;
import com.navercorp.pinpoint.grpc.trace.AgentGrpc;
import com.navercorp.pinpoint.grpc.trace.MetadataGrpc;
import com.navercorp.pinpoint.grpc.trace.PAgentInfo;
import com.navercorp.pinpoint.grpc.trace.PApiMetaData;
import com.navercorp.pinpoint.grpc.trace.PResult;
import com.navercorp.pinpoint.grpc.trace.PSqlMetaData;
import com.navercorp.pinpoint.grpc.trace.PStringMetaData;
import io.grpc.Attributes;
import io.grpc.CallOptions;
import io.grpc.ClientInterceptor;
import io.grpc.ConnectivityState;
import io.grpc.ConnectivityStateInfo;
import io.grpc.EquivalentAddressGroup;
import io.grpc.LoadBalancer;
import io.grpc.ManagedChannel;
import io.grpc.Metadata;
import io.grpc.Status;
import io.grpc.netty.InternalNettyChannelBuilder;
import io.grpc.netty.NettyChannelBuilder;
import io.grpc.stub.MetadataUtils;
import io.grpc.stub.StreamObserver;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.List;
import java.util.concurrent.TimeUnit;
import static com.google.common.base.Preconditions.checkNotNull;
import static io.grpc.ConnectivityState.CONNECTING;
import static io.grpc.ConnectivityState.SHUTDOWN;
import static io.grpc.ConnectivityState.TRANSIENT_FAILURE;
/**
* @author jaehong.kim
*/
public class AgentClientMock {
private final Logger logger = LoggerFactory.getLogger(this.getClass());
private final ManagedChannel channel;
private final AgentGrpc.AgentBlockingStub agentStub;
private final MetadataGrpc.MetadataBlockingStub metadataStub;
public AgentClientMock(final String host, final int port, final boolean agentHeader) throws Exception {
NettyChannelBuilder builder = NettyChannelBuilder.forAddress(host, port);
if (agentHeader) {
AgentHeaderFactory.Header header = new AgentHeaderFactory.Header("mockAgentId", "mockApplicationName", System.currentTimeMillis());
HeaderFactory headerFactory = new AgentHeaderFactory(header);
final Metadata extraHeaders = headerFactory.newHeader();
final ClientInterceptor headersInterceptor = MetadataUtils.newAttachHeadersInterceptor(extraHeaders);
builder.intercept(headersInterceptor);
}
builder.usePlaintext();
channel = builder.build();
this.agentStub = AgentGrpc.newBlockingStub(channel);
this.metadataStub = MetadataGrpc.newBlockingStub(channel);
}
public void stop() throws InterruptedException {
stop(5);
}
public void stop(long await) throws InterruptedException {
channel.shutdown().awaitTermination(await, TimeUnit.SECONDS);
}
public void info() throws InterruptedException {
info(1);
}
public void info(final int count) throws InterruptedException {
for (int i = 0; i < count; i++) {
PAgentInfo request = PAgentInfo.newBuilder().build();
StreamObserver<PResult> responseObserver = getResponseObserver();
PResult pResult = agentStub.requestAgentInfo(request);
logger.info("Result {}", pResult);
}
}
public void apiMetaData() throws InterruptedException {
apiMetaData(1);
}
public void apiMetaData(final int count) throws InterruptedException {
for (int i = 0; i < count; i++) {
PApiMetaData request = PApiMetaData.newBuilder().build();
StreamObserver<PResult> responseObserver = getResponseObserver();
PResult result = metadataStub.requestApiMetaData(request);
}
}
public void sqlMetaData() throws InterruptedException {
sqlMetaData(1);
}
public void sqlMetaData(final int count) throws InterruptedException {
for (int i = 0; i < count; i++) {
PSqlMetaData request = PSqlMetaData.newBuilder().build();
StreamObserver<PResult> responseObserver = getResponseObserver();
PResult result = metadataStub.requestSqlMetaData(request);
}
}
public void stringMetaData() throws InterruptedException {
stringMetaData(1);
}
public void stringMetaData(final int count) throws InterruptedException {
for (int i = 0; i < count; i++) {
PStringMetaData request = PStringMetaData.newBuilder().build();
StreamObserver<PResult> responseObserver = getResponseObserver();
PResult result = metadataStub.requestStringMetaData(request);
}
}
private StreamObserver<PResult> getResponseObserver() {
StreamObserver<PResult> responseObserver = new StreamObserver<PResult>() {
@Override
public void onNext(PResult pResult) {
logger.info("Response {}", pResult);
}
@Override
public void onError(Throwable throwable) {
logger.info("Error ", throwable);
}
@Override
public void onCompleted() {
logger.info("Completed");
}
};
return responseObserver;
}
public class CustomLoadBalancerFactory extends LoadBalancer.Factory {
@Override
public LoadBalancer newLoadBalancer(LoadBalancer.Helper helper) {
return new CustomLoadBalancer(helper);
}
}
static class CustomLoadBalancer extends LoadBalancer {
private final Helper helper;
private Subchannel subchannel;
public CustomLoadBalancer(Helper helper) {
this.helper = helper;
}
@Override
public void handleResolvedAddressGroups(List<EquivalentAddressGroup> servers, Attributes attributes) {
if (subchannel == null) {
subchannel = helper.createSubchannel(servers, Attributes.EMPTY);
// The channel state does not get updated when doing name resolving today, so for the moment
// let LB report CONNECTION and call subchannel.requestConnection() immediately.
helper.updateBalancingState(CONNECTING, new Picker(PickResult.withSubchannel(subchannel)));
subchannel.requestConnection();
} else {
helper.updateSubchannelAddresses(subchannel, servers);
}
}
@Override
public void handleNameResolutionError(Status error) {
if (subchannel != null) {
subchannel.shutdown();
subchannel = null;
}
// NB(lukaszx0) Whether we should propagate the error unconditionally is arguable. It's fine
// for time being.
helper.updateBalancingState(TRANSIENT_FAILURE, new Picker(PickResult.withError(error)));
}
@Override
public void handleSubchannelState(Subchannel subchannel, ConnectivityStateInfo stateInfo) {
ConnectivityState currentState = stateInfo.getState();
if (subchannel != this.subchannel || currentState == SHUTDOWN) {
return;
}
PickResult pickResult;
switch (currentState) {
case CONNECTING:
pickResult = PickResult.withNoResult();
break;
case READY:
case IDLE:
pickResult = PickResult.withSubchannel(subchannel);
break;
case TRANSIENT_FAILURE:
pickResult = PickResult.withError(stateInfo.getStatus());
break;
default:
throw new IllegalArgumentException("Unsupported state:" + currentState);
}
helper.updateBalancingState(currentState, new Picker(pickResult));
}
@Override
public void shutdown() {
if (subchannel != null) {
subchannel.shutdown();
}
}
}
static final class Picker extends LoadBalancer.SubchannelPicker {
private final LoadBalancer.PickResult result;
Picker(LoadBalancer.PickResult result) {
this.result = checkNotNull(result, "result");
}
@Override
public LoadBalancer.PickResult pickSubchannel(LoadBalancer.PickSubchannelArgs args) {
return result;
}
@Override
public void requestConnection() {
LoadBalancer.Subchannel subchannel = result.getSubchannel();
if (subchannel != null) {
subchannel.requestConnection();
}
}
}
}