Support passing request-id and unixmsec to server (#1572)

Signed-off-by: yhmo <yihua.mo@zilliz.com>

sdk-core/src/main/java/io/milvus/v2/client/ConnectConfig.java

@@ -61,6 +61,9 @@ public class ConnectConfig {
     private long idleTimeoutMs = TimeUnit.MILLISECONDS.convert(24, TimeUnit.HOURS);
 
     private SSLContext sslContext;
+    // clientRequestId maintains a map for different threads, each thread can assign a specific id.
+    // the specific id is passed to the server, from the access log we can know which client calls the interface
+    private ThreadLocal<String> clientRequestId;
 
     public String getHost() {
         io.milvus.utils.URLParser urlParser = new io.milvus.utils.URLParser(this.uri);

sdk-core/src/main/java/io/milvus/v2/utils/ClientUtils.java

@@ -19,9 +19,7 @@
 
 package io.milvus.v2.utils;
 
-import io.grpc.ManagedChannel;
-import io.grpc.ManagedChannelBuilder;
-import io.grpc.Metadata;
+import io.grpc.*;
 import io.grpc.netty.shaded.io.grpc.netty.GrpcSslContexts;
 import io.grpc.netty.shaded.io.grpc.netty.NettyChannelBuilder;
 import io.grpc.netty.shaded.io.netty.handler.ssl.ApplicationProtocolConfig;
@@ -33,11 +31,7 @@ import io.grpc.stub.MetadataUtils;
 import io.milvus.client.MilvusServiceClient;
 import io.milvus.grpc.*;
 import io.milvus.v2.client.ConnectConfig;
-import io.grpc.HttpConnectProxiedSocketAddress;
-import io.grpc.ProxiedSocketAddress;
-import io.grpc.ProxyDetector;
 import org.apache.commons.lang3.StringUtils;
-import org.jetbrains.annotations.NotNull;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -47,7 +41,9 @@ import java.net.InetAddress;
 import java.net.UnknownHostException;
 import java.nio.charset.StandardCharsets;
 import java.time.LocalDateTime;
+import java.util.ArrayList;
 import java.util.Base64;
+import java.util.List;
 import java.util.concurrent.TimeUnit;
 import java.net.InetSocketAddress;
 import java.net.SocketAddress;
@@ -66,6 +62,30 @@ public class ClientUtils {
             metadata.put(Metadata.Key.of("dbname", Metadata.ASCII_STRING_MARSHALLER), connectConfig.getDbName());
         }
 
+        List<ClientInterceptor> clientInterceptors = new ArrayList<>();
+        clientInterceptors.add(MetadataUtils.newAttachHeadersInterceptor(metadata));
+        //client interceptor used to fetch client_request_id from threadlocal variable and set it for every grpc request
+        clientInterceptors.add(new ClientInterceptor() {
+            @Override
+            public <ReqT, RespT> ClientCall<ReqT, RespT> interceptCall(MethodDescriptor<ReqT, RespT> method, CallOptions callOptions, Channel next) {
+                return new ForwardingClientCall
+                        .SimpleForwardingClientCall<ReqT, RespT>(next.newCall(method, callOptions)) {
+                    @Override
+                    public void start(ClientCall.Listener<RespT> responseListener, Metadata headers) {
+                        String currentMs = String.valueOf(System.currentTimeMillis());
+                        headers.put(Metadata.Key.of("client-request-unixmsec", Metadata.ASCII_STRING_MARSHALLER), currentMs);
+                        if(connectConfig.getClientRequestId() != null) {
+                            String clientID = connectConfig.getClientRequestId().get();
+                            if (!StringUtils.isEmpty(clientID)) {
+                                headers.put(Metadata.Key.of("client_request_id", Metadata.ASCII_STRING_MARSHALLER), clientID);
+                            }
+                        }
+                        super.start(responseListener, headers);
+                    }
+                };
+            }
+        });
+
         try {
             if (connectConfig.getSslContext() != null) {
                 // sslContext from connect config
@@ -77,7 +97,7 @@ public class ClientUtils {
                         .keepAliveTimeout(connectConfig.getKeepAliveTimeoutMs(), TimeUnit.MILLISECONDS)
                         .keepAliveWithoutCalls(connectConfig.isKeepAliveWithoutCalls())
                         .idleTimeout(connectConfig.getIdleTimeoutMs(), TimeUnit.MILLISECONDS)
-                        .intercept(MetadataUtils.newAttachHeadersInterceptor(metadata));
+                        .intercept(clientInterceptors);
                 
                 if (StringUtils.isNotEmpty(connectConfig.getProxyAddress())) {
                     configureProxy(builder, connectConfig.getProxyAddress());
@@ -104,7 +124,7 @@ public class ClientUtils {
                         .keepAliveTimeout(connectConfig.getKeepAliveTimeoutMs(), TimeUnit.MILLISECONDS)
                         .keepAliveWithoutCalls(connectConfig.isKeepAliveWithoutCalls())
                         .idleTimeout(connectConfig.getIdleTimeoutMs(), TimeUnit.MILLISECONDS)
-                        .intercept(MetadataUtils.newAttachHeadersInterceptor(metadata));
+                        .intercept(clientInterceptors);
 
                 if (StringUtils.isNotEmpty(connectConfig.getProxyAddress())) {
                     configureProxy(builder, connectConfig.getProxyAddress());
@@ -130,7 +150,7 @@ public class ClientUtils {
                         .keepAliveTimeout(connectConfig.getKeepAliveTimeoutMs(), TimeUnit.MILLISECONDS)
                         .keepAliveWithoutCalls(connectConfig.isKeepAliveWithoutCalls())
                         .idleTimeout(connectConfig.getIdleTimeoutMs(), TimeUnit.MILLISECONDS)
-                        .intercept(MetadataUtils.newAttachHeadersInterceptor(metadata));
+                        .intercept(clientInterceptors);
                 
                 if (StringUtils.isNotEmpty(connectConfig.getProxyAddress())) {
                     configureProxy(builder, connectConfig.getProxyAddress());
@@ -152,7 +172,7 @@ public class ClientUtils {
                         .keepAliveTimeout(connectConfig.getKeepAliveTimeoutMs(), TimeUnit.MILLISECONDS)
                         .keepAliveWithoutCalls(connectConfig.isKeepAliveWithoutCalls())
                         .idleTimeout(connectConfig.getIdleTimeoutMs(), TimeUnit.MILLISECONDS)
-                        .intercept(MetadataUtils.newAttachHeadersInterceptor(metadata));
+                        .intercept(clientInterceptors);
                 if (StringUtils.isNotEmpty(connectConfig.getProxyAddress())) {
                     configureProxy(builder, connectConfig.getProxyAddress());
                 }