zipkin.collector.scribe.ScribeSpanConsumer.java Source code

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Here is the source code for zipkin.collector.scribe.ScribeSpanConsumer.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.collector.scribe;

import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.SettableFuture;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
import java.util.List;
import java.util.stream.Collectors;
import zipkin.Codec;
import zipkin.collector.Collector;
import zipkin.collector.CollectorMetrics;
import zipkin.internal.Nullable;
import zipkin.storage.Callback;

final class ScribeSpanConsumer implements Scribe {
    final Collector collector;
    final CollectorMetrics metrics;
    final String category;

    public ScribeSpanConsumer(ScribeCollector.Builder builder) {
        this.collector = builder.delegate.build();
        this.metrics = builder.metrics;
        this.category = builder.category;
    }

    @Override
    public ListenableFuture<ResultCode> log(List<LogEntry> messages) {
        metrics.incrementMessages();
        List<byte[]> thrifts;
        try {
            thrifts = messages.stream().filter(m -> m.category.equals(category))
                    .map(m -> m.message.getBytes(StandardCharsets.ISO_8859_1))
                    .map(b -> Base64.getMimeDecoder().decode(b)) // finagle-zipkin uses mime encoding
                    .collect(Collectors.toList());
        } catch (RuntimeException e) {
            metrics.incrementMessagesDropped();
            return Futures.immediateFailedFuture(e);
        }

        SettableFuture<ResultCode> result = SettableFuture.create();
        collector.acceptSpans(thrifts, Codec.THRIFT, new Callback<Void>() {
            @Override
            public void onSuccess(@Nullable Void value) {
                result.set(ResultCode.OK);
            }

            @Override
            public void onError(Throwable t) {
                result.setException(t);
            }
        });
        return result;
    }
}