| /** |
| * 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.crunch; |
| |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import com.google.common.collect.Maps; |
| import com.google.common.collect.Sets; |
| import org.apache.hadoop.conf.Configuration; |
| |
| /** |
| * Container class that includes optional information about a {@code parallelDo} operation |
| * applied to a {@code PCollection}. Primarily used within the Crunch framework |
| * itself for certain types of advanced processing operations, such as in-memory joins |
| * that require reading a file from the filesystem into a {@code DoFn}. |
| */ |
| public class ParallelDoOptions { |
| private final Set targets; |
| private final Map<String, String> extraConf; |
| |
| private ParallelDoOptions(Set<Target> targets, Map<String, String> extraConf) { |
| this.targets = targets; |
| this.extraConf = extraConf; |
| } |
| |
| @Deprecated |
| public Set<SourceTarget<?>> getSourceTargets() { |
| return (Set<SourceTarget<?>>) targets; |
| } |
| |
| public Set<Target> getTargets() { return targets; } |
| |
| /** |
| * Applies the key-value pairs that were associated with this instance to the given {@code Configuration} |
| * object. This is called just before the {@code configure} method on the {@code DoFn} corresponding to this |
| * instance is called, so it is possible for the {@code DoFn} to see (and possibly override) these settings. |
| */ |
| public void configure(Configuration conf) { |
| for (Map.Entry<String, String> e : extraConf.entrySet()) { |
| conf.set(e.getKey(), e.getValue()); |
| } |
| } |
| |
| public static Builder builder() { |
| return new Builder(); |
| } |
| |
| public static class Builder { |
| private Set<Target> targets; |
| private Map<String, String> extraConf; |
| |
| public Builder() { |
| this.targets = Sets.newHashSet(); |
| this.extraConf = Maps.newHashMap(); |
| } |
| |
| public Builder sources(Source<?>... sources) { |
| return sources(Arrays.asList(sources)); |
| } |
| |
| public Builder sources(Collection<Source<?>> sources) { |
| for (Source<?> src : sources) { |
| // Only SourceTargets need to be checked for materialization |
| if (src instanceof SourceTarget) { |
| targets.add((SourceTarget) src); |
| } |
| } |
| return this; |
| } |
| |
| public Builder sourceTargets(SourceTarget<?>... sourceTargets) { |
| Collections.addAll(this.targets, sourceTargets); |
| return this; |
| } |
| |
| public Builder sourceTargets(Collection<SourceTarget<?>> sourceTargets) { |
| this.targets.addAll(sourceTargets); |
| return this; |
| } |
| |
| public Builder targets(Target... targets) { |
| Collections.addAll(this.targets, targets); |
| return this; |
| } |
| |
| public Builder targets(Collection<Target> targets) { |
| this.targets.addAll(targets); |
| return this; |
| } |
| |
| /** |
| * Specifies key-value pairs that should be added to the {@code Configuration} object associated with the |
| * {@code Job} that includes these options. |
| * @param confKey The key |
| * @param confValue The value |
| * @return This {@code Builder} instance |
| */ |
| public Builder conf(String confKey, String confValue) { |
| this.extraConf.put(confKey, confValue); |
| return this; |
| } |
| |
| public ParallelDoOptions build() { |
| return new ParallelDoOptions(targets, extraConf); |
| } |
| } |
| } |