/*
    * 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.logging.log4j.core.appender;
  
  import java.io.Serializable;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.concurrent.TimeUnit;
  import java.util.zip.Deflater;
  
  import org.apache.logging.log4j.core.Appender;
  import org.apache.logging.log4j.core.Core;
  import org.apache.logging.log4j.core.Filter;
  import org.apache.logging.log4j.core.Layout;
  import org.apache.logging.log4j.core.LogEvent;
  import org.apache.logging.log4j.core.appender.rolling.DefaultRolloverStrategy;
  import org.apache.logging.log4j.core.appender.rolling.DirectFileRolloverStrategy;
  import org.apache.logging.log4j.core.appender.rolling.DirectWriteRolloverStrategy;
  import org.apache.logging.log4j.core.appender.rolling.RollingRandomAccessFileManager;
  import org.apache.logging.log4j.core.appender.rolling.RolloverStrategy;
  import org.apache.logging.log4j.core.appender.rolling.TriggeringPolicy;
  import org.apache.logging.log4j.core.config.Configuration;
  import org.apache.logging.log4j.core.config.plugins.Plugin;
  import org.apache.logging.log4j.core.config.plugins.PluginBuilderAttribute;
  import org.apache.logging.log4j.core.config.plugins.PluginBuilderFactory;
  import org.apache.logging.log4j.core.config.plugins.PluginElement;
  import org.apache.logging.log4j.core.net.Advertiser;
  import org.apache.logging.log4j.core.util.Booleans;
  import org.apache.logging.log4j.core.util.Integers;
  
  /**
   * An appender that writes to random access files and can roll over at
   * intervals.
   */
  @Plugin(name = "RollingRandomAccessFile", category = Core.CATEGORY_NAME, elementType = Appender.ELEMENT_TYPE, printObject = true)
  public final class RollingRandomAccessFileAppender extends AbstractOutputStreamAppender<RollingRandomAccessFileManager> {
  
      public static class Builder<B extends Builder<B>> extends AbstractOutputStreamAppender.Builder<B>
              implements org.apache.logging.log4j.core.util.Builder<RollingRandomAccessFileAppender> {
  
          public Builder() {
              super();
              withBufferSize(RollingRandomAccessFileManager.DEFAULT_BUFFER_SIZE);
              withIgnoreExceptions(true);
              withImmediateFlush(true);
          }
  
          @PluginBuilderAttribute("fileName")
          private String fileName;
  
          @PluginBuilderAttribute("filePattern")
          private String filePattern;
  
          @PluginBuilderAttribute("append")
          private boolean append = true;
  
          @PluginElement("Policy")
          private TriggeringPolicy policy;
  
          @PluginElement("Strategy")
          private RolloverStrategy strategy;
  
          @PluginBuilderAttribute("advertise")
          private boolean advertise;
  
          @PluginBuilderAttribute("advertiseURI")
          private String advertiseURI;
  
          @PluginBuilderAttribute
          private String filePermissions;
  
          @PluginBuilderAttribute
          private String fileOwner;
  
          @PluginBuilderAttribute
          private String fileGroup;
  
          @Override
          public RollingRandomAccessFileAppender build() {
              final String name = getName();
              if (name == null) {
                  LOGGER.error("No name provided for FileAppender");
                  return null;
              }
  
             if (strategy == null) {
                 if (fileName != null) {
                     strategy = DefaultRolloverStrategy.newBuilder()
                             .withCompressionLevelStr(String.valueOf(Deflater.DEFAULT_COMPRESSION))
                             .withConfig(getConfiguration())
                             .build();
                 } else {
                     strategy = DirectWriteRolloverStrategy.newBuilder()
                             .withCompressionLevelStr(String.valueOf(Deflater.DEFAULT_COMPRESSION))
                             .withConfig(getConfiguration())
                             .build();
                 }
             } else if (fileName == null && !(strategy instanceof DirectFileRolloverStrategy)) {
                 LOGGER.error("RollingFileAppender '{}': When no file name is provided a DirectFilenameRolloverStrategy must be configured");
                 return null;
             }
 
             if (filePattern == null) {
                 LOGGER.error("No filename pattern provided for FileAppender with name " + name);
                 return null;
             }
 
             if (policy == null) {
                 LOGGER.error("A TriggeringPolicy must be provided");
                 return null;
             }
 
             final Layout<? extends Serializable> layout = getOrCreateLayout();
 
             final boolean immediateFlush = isImmediateFlush();
             final int bufferSize = getBufferSize();
             final RollingRandomAccessFileManager manager = RollingRandomAccessFileManager
                     .getRollingRandomAccessFileManager(fileName, filePattern, append, immediateFlush, bufferSize, policy,
                             strategy, advertiseURI, layout,
                             filePermissions, fileOwner, fileGroup, getConfiguration());
             if (manager == null) {
                 return null;
             }
 
             manager.initialize();
 
             return new RollingRandomAccessFileAppender(name, layout,getFilter(), manager, fileName, filePattern,
                     isIgnoreExceptions(), immediateFlush, bufferSize, advertise ? getConfiguration().getAdvertiser() : null);
         }
 
         public B withFileName(final String fileName) {
             this.fileName = fileName;
             return asBuilder();
         }
 
         public B withFilePattern(final String filePattern) {
             this.filePattern = filePattern;
             return asBuilder();
         }
 
         public B withAppend(final boolean append) {
             this.append = append;
             return asBuilder();
         }
 
         public B withPolicy(final TriggeringPolicy policy) {
             this.policy = policy;
             return asBuilder();
         }
 
         public B withStrategy(final RolloverStrategy strategy) {
             this.strategy = strategy;
             return asBuilder();
         }
 
         public B withAdvertise(final boolean advertise) {
             this.advertise = advertise;
             return asBuilder();
         }
 
         public B withAdvertiseURI(final String advertiseURI) {
             this.advertiseURI = advertiseURI;
             return asBuilder();
         }
 
         public B withFilePermissions(final String filePermissions) {
             this.filePermissions = filePermissions;
             return asBuilder();
         }
 
         public B withFileOwner(final String fileOwner) {
             this.fileOwner = fileOwner;
             return asBuilder();
         }
 
         public B withFileGroup(final String fileGroup) {
             this.fileGroup = fileGroup;
             return asBuilder();
         }
 
     }
     
     private final String fileName;
     private final String filePattern;
     private final Object advertisement;
     private final Advertiser advertiser;
 
     private RollingRandomAccessFileAppender(final String name, final Layout<? extends Serializable> layout,
             final Filter filter, final RollingRandomAccessFileManager manager, final String fileName,
             final String filePattern, final boolean ignoreExceptions,
             final boolean immediateFlush, final int bufferSize, final Advertiser advertiser) {
         super(name, layout, filter, ignoreExceptions, immediateFlush, manager);
         if (advertiser != null) {
             final Map<String, String> configuration = new HashMap<>(layout.getContentFormat());
             configuration.put("contentType", layout.getContentType());
             configuration.put("name", name);
             advertisement = advertiser.advertise(configuration);
         } else {
             advertisement = null;
         }
         this.fileName = fileName;
         this.filePattern = filePattern;
         this.advertiser = advertiser;
     }
 
     @Override
     public boolean stop(final long timeout, final TimeUnit timeUnit) {
         setStopping();
         super.stop(timeout, timeUnit, false);
         if (advertiser != null) {
             advertiser.unadvertise(advertisement);
         }
         setStopped();
         return true;
     }
 
     /**
      * Write the log entry rolling over the file when required.
      *
      * @param event The LogEvent.
      */
     @Override
     public void append(final LogEvent event) {
         final RollingRandomAccessFileManager manager = getManager();
         manager.checkRollover(event);
 
         // Leverage the nice batching behaviour of async Loggers/Appenders:
         // we can signal the file manager that it needs to flush the buffer
         // to disk at the end of a batch.
         // From a user's point of view, this means that all log events are
         // _always_ available in the log file, without incurring the overhead
         // of immediateFlush=true.
         manager.setEndOfBatch(event.isEndOfBatch()); // FIXME manager's EndOfBatch threadlocal can be deleted
 
         // LOG4J2-1292 utilize gc-free Layout.encode() method: taken care of in superclass
         super.append(event);
     }
 
     /**
      * Returns the File name for the Appender.
      *
      * @return The file name.
      */
     public String getFileName() {
         return fileName;
     }
 
     /**
      * Returns the file pattern used when rolling over.
      *
      * @return The file pattern.
      */
     public String getFilePattern() {
         return filePattern;
     }
 
     /**
      * Returns the size of the file manager's buffer.
      * @return the buffer size
      */
     public int getBufferSize() {
         return getManager().getBufferSize();
     }
 
     /**
      * Create a RollingRandomAccessFileAppender.
      *
      * @param fileName The name of the file that is actively written to.
      *            (required).
      * @param filePattern The pattern of the file name to use on rollover.
      *            (required).
      * @param append If true, events are appended to the file. If false, the
      *            file is overwritten when opened. Defaults to "true"
      * @param name The name of the Appender (required).
      * @param immediateFlush When true, events are immediately flushed. Defaults
      *            to "true".
      * @param bufferSizeStr The buffer size, defaults to {@value RollingRandomAccessFileManager#DEFAULT_BUFFER_SIZE}.
      * @param policy The triggering policy. (required).
      * @param strategy The rollover strategy. Defaults to
      *            DefaultRolloverStrategy.
      * @param layout The layout to use (defaults to the default PatternLayout).
      * @param filter The Filter or null.
      * @param ignoreExceptions If {@code "true"} (default) exceptions encountered when appending events are logged; otherwise
      *               they are propagated to the caller.
      * @param advertise "true" if the appender configuration should be
      *            advertised, "false" otherwise.
      * @param advertiseURI The advertised URI which can be used to retrieve the
      *            file contents.
      * @param configuration The Configuration.
      * @return A RollingRandomAccessFileAppender.
      * @deprecated Use {@link #newBuilder()}.
      */
     @Deprecated
     public static <B extends Builder<B>> RollingRandomAccessFileAppender createAppender(
             final String fileName,
             final String filePattern,
             final String append,
             final String name,
             final String immediateFlush,
             final String bufferSizeStr,
             final TriggeringPolicy policy,
             final RolloverStrategy strategy,
             final Layout<? extends Serializable> layout,
             final Filter filter,
             final String ignoreExceptions,
             final String advertise,
             final String advertiseURI,
             final Configuration configuration) {
 
         final boolean isAppend = Booleans.parseBoolean(append, true);
         final boolean isIgnoreExceptions = Booleans.parseBoolean(ignoreExceptions, true);
         final boolean isImmediateFlush = Booleans.parseBoolean(immediateFlush, true);
         final boolean isAdvertise = Boolean.parseBoolean(advertise);
         final int bufferSize = Integers.parseInt(bufferSizeStr, RollingRandomAccessFileManager.DEFAULT_BUFFER_SIZE);
 
         return RollingRandomAccessFileAppender.<B>newBuilder()
            .withAdvertise(isAdvertise)
            .withAdvertiseURI(advertiseURI)
            .withAppend(isAppend)
            .withBufferSize(bufferSize)
            .setConfiguration(configuration)
            .withFileName(fileName)
            .withFilePattern(filePattern)
            .withFilter(filter)
            .withIgnoreExceptions(isIgnoreExceptions)
            .withImmediateFlush(isImmediateFlush)
            .withLayout(layout)
            .withName(name)
            .withPolicy(policy)
            .withStrategy(strategy)
            .build();
     }
     
     @PluginBuilderFactory
     public static <B extends Builder<B>> B newBuilder() {
         return new Builder<B>().asBuilder();
     }
 
 }