com.datatorrent.lib.io.block.BlockReader.java Source code

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Here is the source code for com.datatorrent.lib.io.block.BlockReader.java

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/**
 * 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 com.datatorrent.lib.io.block;

import java.io.IOException;
import java.net.URI;

import org.apache.hadoop.fs.FileSystem;

import com.datatorrent.api.AutoMetric;

/**
 * BlockReader extends {@link FSSliceReader} to accept case insensitive uri
 */
public class BlockReader extends FSSliceReader {
    @AutoMetric
    private long bytesRead;

    protected String uri;

    @Override
    public void beginWindow(long windowId) {
        super.beginWindow(windowId);
        bytesRead = 0;
    }

    @Override
    protected FileSystem getFSInstance() throws IOException {
        return FileSystem.newInstance(URI.create(uri), configuration);
    }

    /**
     * Sets the uri
     *
     * @param uri of form hdfs://hostname:port/path/to/input
     */
    public void setUri(String uri) {
        this.uri = uri;
    }

    public String getUri() {
        return uri;
    }

}