org.apache.druid.segment.realtime.firehose.LocalFirehoseFactory.java Source code

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Here is the source code for org.apache.druid.segment.realtime.firehose.LocalFirehoseFactory.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 org.apache.druid.segment.realtime.firehose;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Preconditions;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.filefilter.TrueFileFilter;
import org.apache.commons.io.filefilter.WildcardFileFilter;
import org.apache.druid.data.input.FiniteFirehoseFactory;
import org.apache.druid.data.input.InputSplit;
import org.apache.druid.data.input.impl.AbstractTextFilesFirehoseFactory;
import org.apache.druid.data.input.impl.StringInputRowParser;
import org.apache.druid.java.util.common.CompressionUtils;
import org.apache.druid.java.util.emitter.EmittingLogger;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collection;

/**
 */
public class LocalFirehoseFactory extends AbstractTextFilesFirehoseFactory<File> {
    private static final EmittingLogger log = new EmittingLogger(LocalFirehoseFactory.class);

    private final File baseDir;
    private final String filter;
    private final StringInputRowParser parser;

    @JsonCreator
    public LocalFirehoseFactory(@JsonProperty("baseDir") File baseDir, @JsonProperty("filter") String filter,
            // Backwards compatible
            @JsonProperty("parser") StringInputRowParser parser) {
        this.baseDir = baseDir;
        this.filter = filter;
        this.parser = parser;
    }

    @JsonProperty
    public File getBaseDir() {
        return baseDir;
    }

    @JsonProperty
    public String getFilter() {
        return filter;
    }

    @JsonProperty
    public StringInputRowParser getParser() {
        return parser;
    }

    @Override
    protected Collection<File> initObjects() {
        final Collection<File> files = FileUtils.listFiles(Preconditions.checkNotNull(baseDir).getAbsoluteFile(),
                new WildcardFileFilter(filter), TrueFileFilter.INSTANCE);
        log.info("Initialized with " + files + " files");
        return files;
    }

    @Override
    protected InputStream openObjectStream(File object) throws IOException {
        return FileUtils.openInputStream(object);
    }

    @Override
    protected InputStream wrapObjectStream(File object, InputStream stream) throws IOException {
        return CompressionUtils.decompress(stream, object.getPath());
    }

    @Override
    public FiniteFirehoseFactory<StringInputRowParser, File> withSplit(InputSplit<File> split) {
        final File newFile = split.get();
        final File baseDir = newFile.getParentFile();
        final String filter = newFile.getName();
        return new LocalFirehoseFactory(baseDir, filter, parser);
    }
}