1 files changed, 87 insertions, 0 deletions
diff --git a/common/network-common/src/main/java/org/apache/spark/network/protocol/RpcResponse.java b/common/network-common/src/main/java/org/apache/spark/network/protocol/RpcResponse.java
new file mode 100644
index 0000000000..bae866e14a
--- /dev/null
+++ b/common/network-common/src/main/java/org/apache/spark/network/protocol/RpcResponse.java
@@ -0,0 +1,87 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.spark.network.protocol;
+
+import com.google.common.base.Objects;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+
+import org.apache.spark.network.buffer.ManagedBuffer;
+import org.apache.spark.network.buffer.NettyManagedBuffer;
+
+/** Response to {@link RpcRequest} for a successful RPC. */
+public final class RpcResponse extends AbstractResponseMessage {
+  public final long requestId;
+
+  public RpcResponse(long requestId, ManagedBuffer message) {
+    super(message, true);
+    this.requestId = requestId;
+  }
+
+  @Override
+  public Type type() { return Type.RpcResponse; }
+
+  @Override
+  public int encodedLength() {
+    // The integer (a.k.a. the body size) is not really used, since that information is already
+    // encoded in the frame length. But this maintains backwards compatibility with versions of
+    // RpcRequest that use Encoders.ByteArrays.
+    return 8 + 4;
+  }
+
+  @Override
+  public void encode(ByteBuf buf) {
+    buf.writeLong(requestId);
+    // See comment in encodedLength().
+    buf.writeInt((int) body().size());
+  }
+
+  @Override
+  public ResponseMessage createFailureResponse(String error) {
+    return new RpcFailure(requestId, error);
+  }
+
+  public static RpcResponse decode(ByteBuf buf) {
+    long requestId = buf.readLong();
+    // See comment in encodedLength().
+    buf.readInt();
+    return new RpcResponse(requestId, new NettyManagedBuffer(buf.retain()));
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hashCode(requestId, body());
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    if (other instanceof RpcResponse) {
+      RpcResponse o = (RpcResponse) other;
+      return requestId == o.requestId && super.equals(o);
+    }
+    return false;
+  }
+
+  @Override
+  public String toString() {
+    return Objects.toStringHelper(this)
+      .add("requestId", requestId)
+      .add("body", body())
+      .toString();
+  }
+}