zipkin.storage.cassandra.CompositeIndexer.java Source code

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Here is the source code for zipkin.storage.cassandra.CompositeIndexer.java

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/**
 * Copyright 2015-2016 The OpenZipkin Authors
 *
 * 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 zipkin.storage.cassandra;

import com.datastax.driver.core.Session;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheBuilderSpec;
import com.google.common.collect.ImmutableSet;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ConcurrentMap;
import zipkin.Span;
import zipkin.internal.Nullable;
import zipkin.internal.Pair;

final class CompositeIndexer {

    private final Set<Indexer> indexers;
    // Shared across all threads as updates can come from any thread.
    // Shared for all indexes to make data management easier (ex. maximumSize)
    private final ConcurrentMap<PartitionKeyToTraceId, Pair<Long>> sharedState;

    CompositeIndexer(Session session, CacheBuilderSpec spec, int bucketCount, @Nullable Integer indexTtl) {
        this.sharedState = spec == null ? null
                : CacheBuilder.from(spec).<PartitionKeyToTraceId, Pair<Long>>build().asMap();
        Indexer.Factory factory = new Indexer.Factory(session, indexTtl, sharedState);
        this.indexers = ImmutableSet.of(factory.create(new InsertTraceIdByServiceName(bucketCount)),
                factory.create(new InsertTraceIdBySpanName()),
                factory.create(new InsertTraceIdByAnnotation(bucketCount)));
    }

    ImmutableSet<ListenableFuture<?>> index(List<Span> spans) {
        ImmutableSet.Builder<ListenableFuture<?>> result = ImmutableSet.builder();
        for (Indexer optimizer : indexers) {
            result.addAll(optimizer.index(spans));
        }
        return result.build();
    }

    public void clear() {
        sharedState.clear();
    }
}