com.uber.jaeger.senders.ThriftSender Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of jaeger-core Show documentation
Jaeger Java bindings for OpenTracing API
There is a newer version: 0.27.0
/*
 * Copyright (c) 2016, Uber Technologies, Inc
 *
 * 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 com.uber.jaeger.senders;

import com.uber.jaeger.Span;
import com.uber.jaeger.exceptions.SenderException;
import com.uber.jaeger.reporters.protocols.JaegerThriftSpanConverter;
import com.uber.jaeger.reporters.protocols.ThriftUdpTransport;
import com.uber.jaeger.thriftjava.Process;
import java.util.ArrayList;
import java.util.List;
import lombok.ToString;
import org.apache.thrift.TBase;
import org.apache.thrift.TException;
import org.apache.thrift.protocol.TProtocolFactory;
import org.apache.thrift.transport.AutoExpandingBufferWriteTransport;

@ToString(exclude = {"spanBuffer", "memoryTransport"})
public abstract class ThriftSender implements Sender {
  static final int EMIT_BATCH_OVERHEAD = 33;

  private Process process;
  private int processBytesSize;
  private List spanBuffer;
  private int byteBufferSize;
  private AutoExpandingBufferWriteTransport memoryTransport;

  protected final TProtocolFactory protocolFactory;
  private final int maxSpanBytes;

  /**
   * @param protocolFactory protocol factory
   * @param maxPacketSize if 0 it will use default value {@value ThriftUdpTransport#MAX_PACKET_SIZE}
   */
  public ThriftSender(TProtocolFactory protocolFactory, int maxPacketSize) {
    this.protocolFactory = protocolFactory;

    if (maxPacketSize == 0) {
      maxPacketSize = ThriftUdpTransport.MAX_PACKET_SIZE;
    }

    memoryTransport = new AutoExpandingBufferWriteTransport(maxPacketSize, 2);
    maxSpanBytes = maxPacketSize - EMIT_BATCH_OVERHEAD;
    spanBuffer = new ArrayList();
  }

  public abstract void send(Process process, List spans) throws TException;

  @Override
  public int append(Span span) throws SenderException {
    if (process == null) {
      process = new Process(span.getTracer().getServiceName());
      process.setTags(JaegerThriftSpanConverter.buildTags(span.getTracer().tags()));
      processBytesSize = getSizeOfSerializedThrift(process);
      byteBufferSize += processBytesSize;
    }

    com.uber.jaeger.thriftjava.Span thriftSpan = JaegerThriftSpanConverter.convertSpan(span);
    int spanSize = getSizeOfSerializedThrift(thriftSpan);
    if (spanSize > maxSpanBytes) {
      throw new SenderException(String.format("ThriftSender received a span that was too large, size = %d, max = %d",
          spanSize, maxSpanBytes), null, 1);
    }

    byteBufferSize += spanSize;
    if (byteBufferSize <= maxSpanBytes) {
      spanBuffer.add(thriftSpan);
      if (byteBufferSize < maxSpanBytes) {
        return 0;
      }
      return flush();
    }

    int n;
    try {
      n = flush();
    } catch (SenderException e) {
      // +1 for the span not submitted in the buffer above
      throw new SenderException(e.getMessage(), e.getCause(), e.getDroppedSpanCount() + 1);
    }

    spanBuffer.add(thriftSpan);
    byteBufferSize = processBytesSize + spanSize;
    return n;
  }

  @Override
  public int flush() throws SenderException {
    if (spanBuffer.isEmpty()) {
      return 0;
    }

    int n = spanBuffer.size();
    try {
      send(process, spanBuffer);
    } catch (TException e) {
      throw new SenderException("Failed to flush spans.", e, n);
    } finally {
      spanBuffer.clear();
      byteBufferSize = processBytesSize;
    }
    return n;
  }

  @Override
  public int close() throws SenderException {
    return flush();
  }

  int getSizeOfSerializedThrift(TBase thriftBase) throws SenderException {
    memoryTransport.reset();
    try {
      thriftBase.write(protocolFactory.getProtocol(memoryTransport));
    } catch (TException e) {
      throw new SenderException("ThriftSender failed writing to memory buffer.", e, 1);
    }
    return memoryTransport.getPos();
  }
}