org.embulk.output.devnull.NullOutputPlugin Maven / Gradle / Ivy

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Throws records away like /dev/null.

There is a newer version: 0.11.1

/*
 * Copyright 2014 The Embulk project
 *
 * 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.embulk.output.devnull;

import java.util.List;
import org.embulk.config.ConfigDiff;
import org.embulk.config.ConfigSource;
import org.embulk.config.TaskReport;
import org.embulk.config.TaskSource;
import org.embulk.spi.OutputPlugin;
import org.embulk.spi.Page;
import org.embulk.spi.Schema;
import org.embulk.spi.TransactionalPageOutput;
import org.embulk.util.config.ConfigMapperFactory;

public class NullOutputPlugin implements OutputPlugin {
    @Override
    public ConfigDiff transaction(ConfigSource config,
            Schema schema, int taskCount,
            OutputPlugin.Control control) {
        return resume(CONFIG_MAPPER_FACTORY.newTaskSource(), schema, taskCount, control);
    }

    public ConfigDiff resume(TaskSource taskSource,
            Schema schema, int taskCount,
            OutputPlugin.Control control) {
        control.run(taskSource);
        return CONFIG_MAPPER_FACTORY.newConfigDiff();
    }

    public void cleanup(TaskSource taskSource,
            Schema schema, int taskCount,
            List successTaskReports) {}

    @Override
    public TransactionalPageOutput open(TaskSource taskSource, Schema schema, int taskIndex) {
        return new TransactionalPageOutput() {
            public void add(Page page) {
                page.release();
            }

            public void finish() {}

            public void close() {}

            public void abort() {}

            public TaskReport commit() {
                return CONFIG_MAPPER_FACTORY.newTaskReport();
            }
        };
    }

    private static final ConfigMapperFactory CONFIG_MAPPER_FACTORY = ConfigMapperFactory.builder().addDefaultModules().build();
}