org.pentaho.big.data.impl.vfs.hdfs.HDFSFileSystem.java Source code

Introduction

Here is the source code for org.pentaho.big.data.impl.vfs.hdfs.HDFSFileSystem.java

Source

/*******************************************************************************
 *
 * Pentaho Big Data
 *
 * Copyright (C) 2002-2017 by Hitachi Vantara : http://www.pentaho.com
 *
 *******************************************************************************
 *
 * Licensed 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.pentaho.big.data.impl.vfs.hdfs;

import org.apache.commons.vfs2.Capability;
import org.apache.commons.vfs2.FileName;
import org.apache.commons.vfs2.FileObject;
import org.apache.commons.vfs2.FileSystem;
import org.apache.commons.vfs2.FileSystemException;
import org.apache.commons.vfs2.FileSystemOptions;
import org.apache.commons.vfs2.provider.AbstractFileName;
import org.apache.commons.vfs2.provider.AbstractFileSystem;
import org.pentaho.bigdata.api.hdfs.HadoopFileSystem;

import java.util.Collection;

public class HDFSFileSystem extends AbstractFileSystem implements FileSystem {
    private final HadoopFileSystem hdfs;

    public HDFSFileSystem(final FileName rootName, final FileSystemOptions fileSystemOptions,
            HadoopFileSystem hdfs) {
        super(rootName, null, fileSystemOptions);
        this.hdfs = hdfs;
    }

    @Override
    @SuppressWarnings({ "unchecked", "rawtypes" })
    protected void addCapabilities(Collection caps) {
        caps.addAll(HDFSFileProvider.capabilities);
        // Adding capabilities depending on configuration settings
        try {
            if (Boolean.parseBoolean(getHDFSFileSystem().getProperty("dfs.support.append", "true"))) {
                caps.add(Capability.APPEND_CONTENT);
            }
        } catch (FileSystemException e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    protected FileObject createFile(AbstractFileName name) throws Exception {
        return new HDFSFileObject(name, this);
    }

    public HadoopFileSystem getHDFSFileSystem() throws FileSystemException {
        return hdfs;
    }
}