org.apache.solr.hadoop.PathParts.java Source code

Introduction

Here is the source code for org.apache.solr.hadoop.PathParts.java

Source

/*
 * 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.solr.hadoop;

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

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.server.namenode.NameNode;

/**
 * Extracts various components of an HDFS Path
 */
public final class PathParts {

    private final String uploadURL;
    private final Configuration conf;
    private final FileSystem fs;
    private final Path normalizedPath;
    private FileStatus stats;

    public PathParts(String uploadURL, Configuration conf) throws IOException {
        if (uploadURL == null) {
            throw new IllegalArgumentException("Path must not be null: " + uploadURL);
        }
        this.uploadURL = uploadURL;
        if (conf == null) {
            throw new IllegalArgumentException("Configuration must not be null: " + uploadURL);
        }
        this.conf = conf;
        URI uri = stringToUri(uploadURL);
        this.fs = FileSystem.get(uri, conf);
        if (fs == null) {
            throw new IllegalArgumentException("File system must not be null: " + uploadURL);
        }
        this.normalizedPath = fs.makeQualified(new Path(uri));
        if (!normalizedPath.isAbsolute()) {
            throw new IllegalArgumentException("Path must be absolute: " + uploadURL);
        }
        if (getScheme() == null) {
            throw new IllegalArgumentException("Scheme must not be null: " + uploadURL);
        }
        if (getHost() == null) {
            throw new IllegalArgumentException("Host must not be null: " + uploadURL);
        }
        if (getPort() < 0) {
            throw new IllegalArgumentException("Port must not be negative: " + uploadURL);
        }
    }

    public String getUploadURL() {
        return uploadURL;
    }

    public Path getUploadPath() {
        return new Path(getUploadURL());
    }

    public String getURIPath() {
        return normalizedPath.toUri().getPath();
    }

    public String getName() {
        return normalizedPath.getName();
    }

    public String getScheme() {
        return normalizedPath.toUri().getScheme();
    }

    public String getHost() {
        return normalizedPath.toUri().getHost();
    }

    public int getPort() {
        int port = normalizedPath.toUri().getPort();
        if (port == -1) {
            port = fs.getWorkingDirectory().toUri().getPort();
            if (port == -1) {
                port = NameNode.DEFAULT_PORT;
            }
        }
        return port;
    }

    public String getId() {
        return getScheme() + "://" + getHost() + ":" + getPort() + getURIPath();
    }

    public String getDownloadURL() {
        return getId();
    }

    public Configuration getConfiguration() {
        return conf;
    }

    public FileSystem getFileSystem() {
        return fs;
    }

    public FileStatus getFileStatus() throws IOException {
        if (stats == null) {
            stats = getFileSystem().getFileStatus(getUploadPath());
        }
        return stats;
    }

    private URI stringToUri(String pathString) {
        //return new Path(pathString).toUri().normalize();
        return URI.create(pathString).normalize();
    }
}