Repository: ignite Updated Branches: refs/heads/ignite-1.6.8-hadoop b49fe400b -> 11b008730
http://git-wip-us.apache.org/repos/asf/ignite/blob/11b00873/modules/hadoop/src/main/java/org/apache/ignite/internal/processors/hadoop/proto/HadoopProtocolTaskAdapter.java ---------------------------------------------------------------------- diff --git a/modules/hadoop/src/main/java/org/apache/ignite/internal/processors/hadoop/proto/HadoopProtocolTaskAdapter.java b/modules/hadoop/src/main/java/org/apache/ignite/internal/processors/hadoop/proto/HadoopProtocolTaskAdapter.java new file mode 100644 index 0000000..c3227ae --- /dev/null +++ b/modules/hadoop/src/main/java/org/apache/ignite/internal/processors/hadoop/proto/HadoopProtocolTaskAdapter.java @@ -0,0 +1,120 @@ +/* + * 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.ignite.internal.processors.hadoop.proto; + +import java.util.Collections; +import java.util.List; +import java.util.Map; +import org.apache.ignite.Ignite; +import org.apache.ignite.IgniteCheckedException; +import org.apache.ignite.cluster.ClusterNode; +import org.apache.ignite.compute.ComputeJob; +import org.apache.ignite.compute.ComputeJobContext; +import org.apache.ignite.compute.ComputeJobResult; +import org.apache.ignite.compute.ComputeJobResultPolicy; +import org.apache.ignite.compute.ComputeTask; +import org.apache.ignite.internal.IgniteEx; +import org.apache.ignite.internal.processors.hadoop.Hadoop; +import org.apache.ignite.internal.util.typedef.F; +import org.apache.ignite.internal.util.typedef.internal.U; +import org.apache.ignite.resources.IgniteInstanceResource; +import org.apache.ignite.resources.JobContextResource; +import org.jetbrains.annotations.Nullable; + +/** + * Hadoop protocol task adapter. + */ +public abstract class HadoopProtocolTaskAdapter<R> implements ComputeTask<HadoopProtocolTaskArguments, R> { + /** {@inheritDoc} */ + @Nullable @Override public Map<? extends ComputeJob, ClusterNode> map(List<ClusterNode> subgrid, + @Nullable HadoopProtocolTaskArguments arg) { + return Collections.singletonMap(new Job(arg), subgrid.get(0)); + } + + /** {@inheritDoc} */ + @Override public ComputeJobResultPolicy result(ComputeJobResult res, List<ComputeJobResult> rcvd) { + return ComputeJobResultPolicy.REDUCE; + } + + /** {@inheritDoc} */ + @Nullable @Override public R reduce(List<ComputeJobResult> results) { + if (!F.isEmpty(results)) { + ComputeJobResult res = results.get(0); + + return res.getData(); + } + else + return null; + } + + /** + * Job wrapper. + */ + private class Job implements ComputeJob { + /** */ + private static final long serialVersionUID = 0L; + + /** */ + @IgniteInstanceResource + private Ignite ignite; + + /** */ + @SuppressWarnings("UnusedDeclaration") + @JobContextResource + private ComputeJobContext jobCtx; + + /** Argument. */ + private final HadoopProtocolTaskArguments args; + + /** + * Constructor. + * + * @param args Job argument. + */ + private Job(HadoopProtocolTaskArguments args) { + this.args = args; + } + + /** {@inheritDoc} */ + @Override public void cancel() { + // No-op. + } + + /** {@inheritDoc} */ + @Nullable @Override public Object execute() { + try { + return run(jobCtx, ((IgniteEx)ignite).hadoop(), args); + } + catch (IgniteCheckedException e) { + throw U.convertException(e); + } + } + } + + /** + * Run the task. + * + * @param jobCtx Job context. + * @param hadoop Hadoop facade. + * @param args Arguments. + * @return Job result. + * @throws IgniteCheckedException If failed. + */ + public abstract R run(ComputeJobContext jobCtx, Hadoop hadoop, HadoopProtocolTaskArguments args) + throws IgniteCheckedException; +} \ No newline at end of file
