* 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.

*/

    @Override

    public TaskID createTaskID() {

        return new TaskID("", 0, TaskType.MAP, 0);

    }

    @Override

    public TaskAttemptID createTaskAttemptID() {

        return new TaskAttemptID("", 0, TaskType.MAP, 0, 0);

    }

    @Override

    public org.apache.hadoop.mapreduce.TaskAttemptContext createTaskAttemptContext(Configuration conf,

                                                                                   org.apache.hadoop.mapreduce.TaskAttemptID taskId) {

        return new org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl(

          conf instanceof JobConf? new JobConf(conf) : conf,

          taskId);

    }

    @Override

    public org.apache.hadoop.mapred.TaskAttemptContext createTaskAttemptContext(org.apache.hadoop.mapred.JobConf conf,

                                                                                org.apache.hadoop.mapred.TaskAttemptID taskId, Progressable progressable) {

        org.apache.hadoop.mapred.TaskAttemptContext newContext = null;

        try {

            java.lang.reflect.Constructor construct = org.apache.hadoop.mapred.TaskAttemptContextImpl.class.getDeclaredConstructor(

                org.apache.hadoop.mapred.JobConf.class, org.apache.hadoop.mapred.TaskAttemptID.class,

                Reporter.class);

            construct.setAccessible(true);

            newContext = (org.apache.hadoop.mapred.TaskAttemptContext) construct.newInstance(

                           new JobConf(conf), taskId, (Reporter) progressable);

        } catch (Exception e) {

            throw new RuntimeException(e);

        }

        return newContext;

    }

    @Override

    public JobContext createJobContext(Configuration conf,

                                       JobID jobId) {

        return new JobContextImpl(conf instanceof JobConf? new JobConf(conf) : conf,

                                  jobId);

    }

    @Override

    public org.apache.hadoop.mapred.JobContext createJobContext(org.apache.hadoop.mapred.JobConf conf,

                                                                org.apache.hadoop.mapreduce.JobID jobId, Progressable progressable) {

        return new org.apache.hadoop.mapred.JobContextImpl(

          new JobConf(conf), jobId, (org.apache.hadoop.mapred.Reporter) progressable);

    }

    @Override

    public void commitJob(OutputFormat outputFormat, Job job) throws IOException {

        // Do nothing as this was fixed by MAPREDUCE-1447.

    }

    @Override

    public void abortJob(OutputFormat outputFormat, Job job) throws IOException {

        // Do nothing as this was fixed by MAPREDUCE-1447.

    }

    @Override

    public InetSocketAddress getResourceManagerAddress(Configuration conf) {

        String addr = conf.get("yarn.resourcemanager.address", "localhost:8032");

        return NetUtils.createSocketAddr(addr);

    }

    @Override

    public String getPropertyName(PropertyName name) {

        switch (name) {

        case CACHE_ARCHIVES:

            return MRJobConfig.CACHE_ARCHIVES;

        case CACHE_FILES:

            return MRJobConfig.CACHE_FILES;

        case CACHE_SYMLINK:

            return MRJobConfig.CACHE_SYMLINK;

        }

        return "";

    }

    @Override

    public boolean isFileInHDFS(FileSystem fs, Path path) throws IOException {

        // In case of viewfs we need to lookup where the actual file is to know the filesystem in use.

        // resolvePath is a sure shot way of knowing which file system the file is.

        return "hdfs".equals(fs.resolvePath(path).toUri().getScheme());

    }

}