HADOOP-11388. Remove deprecated o.a.h.metrics.file.FileContext. Contributed by Li Lu.

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -560,6 +560,9 @@ Release 2.7.0 - UNRELEASED
 
     HADOOP-10482. Fix various findbugs warnings in hadoop-common. (wheat9)
 
+    HADOOP-11388. Remove deprecated o.a.h.metrics.file.FileContext.
+    (Li Lu via wheat9)
+
 Release 2.6.0 - 2014-11-18
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/file/FileContext.java

@@ -1,159 +0,0 @@
-/*
- * FileContext.java
- *
- * 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.metrics.file;
-
-import java.io.BufferedOutputStream;
-import java.io.File;
-import java.io.FileWriter;
-import java.io.IOException;
-import java.io.PrintWriter;
-
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.metrics.ContextFactory;
-import org.apache.hadoop.metrics.spi.AbstractMetricsContext;
-import org.apache.hadoop.metrics.spi.OutputRecord;
-
-/**
- * Metrics context for writing metrics to a file.<p/>
- *
- * This class is configured by setting ContextFactory attributes which in turn
- * are usually configured through a properties file.  All the attributes are
- * prefixed by the contextName. For example, the properties file might contain:
- * <pre>
- * myContextName.fileName=/tmp/metrics.log
- * myContextName.period=5
- * </pre>
- * @see org.apache.hadoop.metrics2.sink.FileSink for metrics 2.0.
- */
-@InterfaceAudience.Public
-@InterfaceStability.Evolving
-@Deprecated
-public class FileContext extends AbstractMetricsContext {
-    
-  /* Configuration attribute names */
-  @InterfaceAudience.Private
-  protected static final String FILE_NAME_PROPERTY = "fileName";
-  @InterfaceAudience.Private
-  protected static final String PERIOD_PROPERTY = "period";
-    
-  private File file = null;              // file for metrics to be written to
-  private PrintWriter writer = null;
-    
-  /** Creates a new instance of FileContext */
-  @InterfaceAudience.Private
-  public FileContext() {}
-    
-  @Override
-  @InterfaceAudience.Private
-  public void init(String contextName, ContextFactory factory) {
-    super.init(contextName, factory);
-        
-    String fileName = getAttribute(FILE_NAME_PROPERTY);
-    if (fileName != null) {
-      file = new File(fileName);
-    }
-        
-    parseAndSetPeriod(PERIOD_PROPERTY);
-  }
-
-  /**
-   * Returns the configured file name, or null.
-   */
-  @InterfaceAudience.Private
-  public String getFileName() {
-    if (file == null) {
-      return null;
-    } else {
-      return file.getName();
-    }
-  }
-    
-  /**
-   * Starts or restarts monitoring, by opening in append-mode, the
-   * file specified by the <code>fileName</code> attribute,
-   * if specified. Otherwise the data will be written to standard
-   * output.
-   */
-  @Override
-  @InterfaceAudience.Private
-  public void startMonitoring()
-    throws IOException 
-  {
-    if (file == null) {
-      writer = new PrintWriter(new BufferedOutputStream(System.out));
-    } else {
-      writer = new PrintWriter(new FileWriter(file, true));
-    }
-    super.startMonitoring();
-  }
-    
-  /**
-   * Stops monitoring, closing the file.
-   * @see #close()
-   */
-  @Override
-  @InterfaceAudience.Private
-  public void stopMonitoring() {
-    super.stopMonitoring();
-        
-    if (writer != null) {
-      writer.close();
-      writer = null;
-    }
-  }
-    
-  /**
-   * Emits a metrics record to a file.
-   */
-  @Override
-  @InterfaceAudience.Private
-  public void emitRecord(String contextName, String recordName, OutputRecord outRec) {
-    writer.print(contextName);
-    writer.print(".");
-    writer.print(recordName);
-    String separator = ": ";
-    for (String tagName : outRec.getTagNames()) {
-      writer.print(separator);
-      separator = ", ";
-      writer.print(tagName);
-      writer.print("=");
-      writer.print(outRec.getTag(tagName));
-    }
-    for (String metricName : outRec.getMetricNames()) {
-      writer.print(separator);
-      separator = ", ";
-      writer.print(metricName);
-      writer.print("=");
-      writer.print(outRec.getMetric(metricName));
-    }
-    writer.println();
-  }
-    
-  /**
-   * Flushes the output writer, forcing updates to disk.
-   */
-  @Override
-  @InterfaceAudience.Private
-  public void flush() {
-    writer.flush();
-  }
-}