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Error id adjustments for intake v2 (#217)
- add transactionId to TraceContext - Error.id is required in intake v2 - Error.id is 128 bits long closes #213
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170 changes: 170 additions & 0 deletions
170
apm-agent-core/src/main/java/co/elastic/apm/impl/transaction/Id.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,170 @@ | ||
| /*- | ||
| * #%L | ||
| * Elastic APM Java agent | ||
| * %% | ||
| * Copyright (C) 2018 Elastic and contributors | ||
| * %% | ||
| * 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. | ||
| * #L% | ||
| */ | ||
| package co.elastic.apm.impl.transaction; | ||
|
|
||
| import co.elastic.apm.objectpool.Recyclable; | ||
| import co.elastic.apm.util.HexUtils; | ||
| import com.dslplatform.json.JsonWriter; | ||
|
|
||
| import javax.annotation.Nullable; | ||
| import java.nio.ByteBuffer; | ||
| import java.util.Arrays; | ||
| import java.util.Random; | ||
| import java.util.concurrent.ThreadLocalRandom; | ||
|
|
||
| /** | ||
| * A 128 bit globally unique ID of the whole trace forest | ||
| */ | ||
| public class Id implements Recyclable { | ||
|
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| private final byte[] data; | ||
| private boolean empty = true; | ||
| @Nullable | ||
| private String cachedStringRepresentation; | ||
|
|
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| public static Id new128BitId() { | ||
| return new Id(16); | ||
| } | ||
|
|
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| public static Id new64BitId() { | ||
| return new Id(8); | ||
| } | ||
|
|
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| private Id(int idLengthBytes) { | ||
| data = new byte[idLengthBytes]; | ||
| } | ||
|
|
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| public void setToRandomValue() { | ||
| setToRandomValue(ThreadLocalRandom.current()); | ||
| } | ||
|
|
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| public void setToRandomValue(Random random) { | ||
| random.nextBytes(data); | ||
| onMutation(false); | ||
| } | ||
|
|
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| public void fromHexString(String hexEncodedString, int offset) { | ||
| HexUtils.nextBytes(hexEncodedString, offset, data); | ||
| onMutation(); | ||
| } | ||
|
|
||
| public void fromLongs(long... values) { | ||
| if (values.length * Long.BYTES != data.length) { | ||
| throw new IllegalArgumentException("Invalid number of long values"); | ||
| } | ||
| final ByteBuffer buffer = ByteBuffer.wrap(data); | ||
| for (long value : values) { | ||
| buffer.putLong(value); | ||
| } | ||
| onMutation(); | ||
| } | ||
|
|
||
| @Override | ||
| public void resetState() { | ||
| for (int i = 0; i < data.length; i++) { | ||
| data[i] = 0; | ||
| } | ||
| onMutation(true); | ||
| } | ||
|
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| public void copyFrom(Id other) { | ||
| System.arraycopy(other.data, 0, data, 0, data.length); | ||
| onMutation(other.empty); | ||
| } | ||
|
|
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| private void onMutation() { | ||
| onMutation(isAllZeros(data)); | ||
| } | ||
|
|
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| private void onMutation(boolean empty) { | ||
| cachedStringRepresentation = null; | ||
| this.empty = empty; | ||
| } | ||
|
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||
| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) return true; | ||
| if (o == null || getClass() != o.getClass()) return false; | ||
| Id that = (Id) o; | ||
| return Arrays.equals(data, that.data); | ||
| } | ||
|
|
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| @Override | ||
| public int hashCode() { | ||
| return Arrays.hashCode(data); | ||
| } | ||
|
|
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| @Override | ||
| public String toString() { | ||
| String s = cachedStringRepresentation; | ||
| if (s == null) { | ||
| s = cachedStringRepresentation = HexUtils.bytesToHex(data); | ||
| } | ||
| return s; | ||
| } | ||
|
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| public boolean isEmpty() { | ||
| return empty; | ||
| } | ||
|
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| private static boolean isAllZeros(byte[] bytes) { | ||
| for (byte b : bytes) { | ||
| if (b != 0) { | ||
| return false; | ||
| } | ||
| } | ||
| return true; | ||
| } | ||
|
|
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| public void writeAsHex(JsonWriter jw) { | ||
| HexUtils.writeBytesAsHex(data, jw); | ||
| } | ||
|
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| public void writeAsHex(StringBuilder sb) { | ||
| HexUtils.writeBytesAsHex(data, sb); | ||
| } | ||
|
|
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| /** | ||
| * Returns the last 8 bytes of this id as a {@code long}. | ||
| * <p> | ||
| * The least significant bits (the right part) of an id is preferred to be used for making random sampling decisions. | ||
| * </p> | ||
| * <p> | ||
| * "There are systems that make random sampling decisions based on the value of trace-id. | ||
| * So to increase interoperability it is recommended to keep the random part on the right side of trace-id value." | ||
| * </p> | ||
| * @see <a href="https://github.com/w3c/distributed-tracing/blob/master/trace_context/HTTP_HEADER_FORMAT.md#trace-id">W3C trace context spec</a> | ||
| * @return the last 8 bytes of this id as a {@code long} | ||
| */ | ||
| public long getLeastSignificantBits() { | ||
| return readLong(data.length - 8); | ||
| } | ||
|
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| /** | ||
| * Converts the next 8 bytes, starting from the offset, to a {@code long} | ||
| */ | ||
| public long readLong(int offset) { | ||
| long lsb = 0; | ||
| for (int i = offset; i < offset + 8; i++) { | ||
| lsb = (lsb << 8) | (data[i] & 0xff); | ||
| } | ||
| return lsb; | ||
| } | ||
| } |
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