modules/core/src/test/java/org/apache/ignite/platform/PlatformGetInternalCachesTask.java

/*
 * 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.platform;

import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import org.apache.ignite.Ignite;
import org.apache.ignite.cluster.ClusterNode;
import org.apache.ignite.compute.ComputeJob;
import org.apache.ignite.compute.ComputeJobAdapter;
import org.apache.ignite.compute.ComputeJobResult;
import org.apache.ignite.compute.ComputeTaskAdapter;
import org.apache.ignite.configuration.IgniteConfiguration;
import org.apache.ignite.internal.IgniteEx;
import org.apache.ignite.internal.binary.BinaryCachingMetadataHandler;
import org.apache.ignite.internal.binary.BinaryContext;
import org.apache.ignite.internal.binary.BinaryWriterExImpl;
import org.apache.ignite.internal.binary.streams.BinaryHeapOutputStream;
import org.apache.ignite.internal.processors.cache.IgniteInternalCache;
import org.apache.ignite.internal.processors.platform.utils.PlatformConfigurationUtils;
import org.apache.ignite.internal.util.typedef.F;
import org.apache.ignite.resources.IgniteInstanceResource;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * Task to get internal caches.
 */
public class PlatformGetInternalCachesTask extends ComputeTaskAdapter<Object, byte[]> {
    /** {@inheritDoc} */
    @NotNull @Override public Map<? extends ComputeJob, ClusterNode> map(List<ClusterNode> subgrid,
        @Nullable Object arg) {
        return Collections.singletonMap(new InternalCachesJob(), F.first(subgrid));
    }

    /** {@inheritDoc} */
    @Override public byte[] reduce(List<ComputeJobResult> results) {
        return results.get(0).getData();
    }

    /**
     * Job.
     */
    @SuppressWarnings("rawtypes")
    private static class InternalCachesJob extends ComputeJobAdapter {
        /** */
        @SuppressWarnings("unused")
        @IgniteInstanceResource
        private Ignite ignite;

        /** {@inheritDoc} */
        @Override public byte[] execute() {
            IgniteEx ign = (IgniteEx)ignite;

            BinaryContext ctx = new BinaryContext(BinaryCachingMetadataHandler.create(), new IgniteConfiguration(), null);

            try (BinaryWriterExImpl writer = new BinaryWriterExImpl(ctx, new BinaryHeapOutputStream(512), null, null)) {
                Collection<IgniteInternalCache<?, ?>> caches = ign.cachesx();

                writer.writeInt(caches.size());

                for (IgniteInternalCache c : caches) {
                    PlatformConfigurationUtils.writeCacheConfiguration(writer, c.configuration());
                }

                return writer.out().arrayCopy();
            }
        }
    }
}