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117
...-agentcore-implement/src/main/java/io/sermant/implement/service/xds/client/XdsClient.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| /* | ||
| * Copyright (C) 2024-2024 Sermant Authors. All rights reserved. | ||
| * | ||
| * 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 io.sermant.implement.service.xds.client; | ||
|
|
||
| import io.envoyproxy.envoy.service.discovery.v3.AggregatedDiscoveryServiceGrpc; | ||
| import io.envoyproxy.envoy.service.discovery.v3.AggregatedDiscoveryServiceGrpc.AggregatedDiscoveryServiceStub; | ||
| import io.envoyproxy.envoy.service.discovery.v3.DiscoveryRequest; | ||
| import io.envoyproxy.envoy.service.discovery.v3.DiscoveryResponse; | ||
| import io.grpc.ManagedChannel; | ||
| import io.grpc.Metadata; | ||
| import io.grpc.Metadata.Key; | ||
| import io.grpc.netty.GrpcSslContexts; | ||
| import io.grpc.netty.NettyChannelBuilder; | ||
| import io.grpc.stub.MetadataUtils; | ||
| import io.grpc.stub.StreamObserver; | ||
| import io.netty.handler.ssl.SslContext; | ||
| import io.netty.handler.ssl.util.InsecureTrustManagerFactory; | ||
| import io.sermant.core.common.LoggerFactory; | ||
| import io.sermant.core.config.ConfigManager; | ||
| import io.sermant.core.service.xds.config.XdsConfig; | ||
| import io.sermant.core.utils.FileUtils; | ||
|
|
||
| import java.io.Closeable; | ||
| import java.io.IOException; | ||
| import java.util.logging.Level; | ||
| import java.util.logging.Logger; | ||
|
|
||
| import javax.net.ssl.SSLException; | ||
|
|
||
| /** | ||
| * XdsClient | ||
| * | ||
| * @author daizhenyu | ||
| * @since 2024-05-09 | ||
| **/ | ||
| public class XdsClient implements Closeable { | ||
| private static final Logger LOGGER = LoggerFactory.getLogger(); | ||
|
|
||
| private XdsConfig config = ConfigManager.getConfig(XdsConfig.class); | ||
|
|
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| private ManagedChannel channel; | ||
|
|
||
| /** | ||
| * construction method | ||
| */ | ||
| public XdsClient() { | ||
| createChannel(); | ||
| } | ||
|
|
||
| private void createChannel() { | ||
| NettyChannelBuilder nettyChannelBuilder = NettyChannelBuilder.forTarget(config.getControlPlaneAddress()); | ||
| if (config.isSecurityEnable()) { | ||
| try { | ||
| SslContext context = GrpcSslContexts.forClient() | ||
| .trustManager(InsecureTrustManagerFactory.INSTANCE) | ||
| .build(); | ||
| nettyChannelBuilder.sslContext(context); | ||
| } catch (SSLException e) { | ||
| LOGGER.log(Level.SEVERE, "SSLException occurred when creating gRPC channel", e); | ||
| } | ||
| } else { | ||
| nettyChannelBuilder.usePlaintext(); | ||
| } | ||
| channel = nettyChannelBuilder.build(); | ||
| } | ||
|
|
||
| /** | ||
| * update channel | ||
| */ | ||
| public void updateChannel() { | ||
| if (channel == null || channel.isShutdown() || channel.isTerminated()) { | ||
| synchronized (this) { | ||
| if (channel == null || channel.isShutdown() || channel.isTerminated()) { | ||
| createChannel(); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * get ADS grpc request stream observer | ||
| * | ||
| * @param observer DiscoveryResponse observer | ||
| * @return StreamObserver | ||
| */ | ||
| public StreamObserver<DiscoveryRequest> getDiscoveryRequestObserver(StreamObserver<DiscoveryResponse> observer) { | ||
| AggregatedDiscoveryServiceStub stub = AggregatedDiscoveryServiceGrpc.newStub(channel); | ||
| if (config.isSecurityEnable()) { | ||
| Metadata header = new Metadata(); | ||
| Key<String> authorization = Key.of("authorization", Metadata.ASCII_STRING_MARSHALLER); | ||
| header.put(authorization, "Bearer " + FileUtils.readFileToString(config.getTokenPath())); | ||
| stub = MetadataUtils.attachHeaders(stub, header); | ||
| } | ||
| return stub.streamAggregatedResources(observer); | ||
| } | ||
|
|
||
| @Override | ||
| public void close() throws IOException { | ||
| if (channel != null) { | ||
| channel.shutdown(); | ||
| } | ||
| } | ||
| } |
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