MAPREDUCE-7433. Remove unused mapred/LoggingHttpResponseEncoder.java. (#5388)

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-shuffle/src/main/java/org/apache/hadoop/mapred/LoggingHttpResponseEncoder.java

@@ -1,106 +0,0 @@
-/*
- * 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.hadoop.mapred;
-
-import io.netty.buffer.ByteBuf;
-import io.netty.channel.ChannelHandlerContext;
-import io.netty.channel.ChannelPromise;
-import io.netty.handler.codec.http.HttpHeaders;
-import io.netty.handler.codec.http.HttpResponse;
-import io.netty.handler.codec.http.HttpResponseEncoder;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import java.util.List;
-
-class LoggingHttpResponseEncoder extends HttpResponseEncoder {
-  private static final Logger LOG = LoggerFactory.getLogger(LoggingHttpResponseEncoder.class);
-  private final boolean logStacktraceOfEncodingMethods;
-
-  LoggingHttpResponseEncoder(boolean logStacktraceOfEncodingMethods) {
-    this.logStacktraceOfEncodingMethods = logStacktraceOfEncodingMethods;
-  }
-
-  @Override
-  public boolean acceptOutboundMessage(Object msg) throws Exception {
-    printExecutingMethod();
-    LOG.info("OUTBOUND MESSAGE: " + msg);
-    return super.acceptOutboundMessage(msg);
-  }
-
-  @Override
-  protected void encodeInitialLine(ByteBuf buf, HttpResponse response) throws Exception {
-    LOG.debug("Executing method: {}, response: {}",
-        getExecutingMethodName(), response);
-    logStacktraceIfRequired();
-    super.encodeInitialLine(buf, response);
-  }
-
-  @Override
-  protected void encode(ChannelHandlerContext ctx, Object msg,
-      List<Object> out) throws Exception {
-    LOG.debug("Encoding to channel {}: {}", ctx.channel(), msg);
-    printExecutingMethod();
-    logStacktraceIfRequired();
-    super.encode(ctx, msg, out);
-  }
-
-  @Override
-  protected void encodeHeaders(HttpHeaders headers, ByteBuf buf) {
-    printExecutingMethod();
-    super.encodeHeaders(headers, buf);
-  }
-
-  @Override
-  public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise
-      promise) throws Exception {
-    LOG.debug("Writing to channel {}: {}", ctx.channel(), msg);
-    printExecutingMethod();
-    super.write(ctx, msg, promise);
-  }
-
-  private void logStacktraceIfRequired() {
-    if (logStacktraceOfEncodingMethods) {
-      LOG.debug("Stacktrace: ", new Throwable());
-    }
-  }
-
-  private void printExecutingMethod() {
-    String methodName = getExecutingMethodName(1);
-    LOG.debug("Executing method: {}", methodName);
-  }
-
-  private String getExecutingMethodName() {
-    return getExecutingMethodName(0);
-  }
-
-  private String getExecutingMethodName(int additionalSkipFrames) {
-    try {
-      StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
-      // Array items (indices):
-      // 0: java.lang.Thread.getStackTrace(...)
-      // 1: TestShuffleHandler$LoggingHttpResponseEncoder.getExecutingMethodName(...)
-      int skipFrames = 2 + additionalSkipFrames;
-      String methodName = stackTrace[skipFrames].getMethodName();
-      String className = this.getClass().getSimpleName();
-      return className + "#" + methodName;
-    } catch (Throwable t) {
-      LOG.error("Error while getting execution method name", t);
-      return "unknown";
-    }
-  }
-}