diff --git a/opentelemetry/src/main/java/io/grpc/opentelemetry/BinaryFormat.java b/opentelemetry/src/main/java/io/grpc/opentelemetry/BinaryFormat.java new file mode 100644 index 00000000000..d4cb929b99e --- /dev/null +++ b/opentelemetry/src/main/java/io/grpc/opentelemetry/BinaryFormat.java @@ -0,0 +1,33 @@ +/* + * Copyright 2024 The gRPC 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 io.grpc.opentelemetry; + + +import io.opentelemetry.api.trace.SpanContext; + +/** + * This is a helper class for SpanContext propagation on the wire using binary encoding. + */ +abstract class BinaryFormat { + public byte[] toByteArray(SpanContext spanContext) { + throw new UnsupportedOperationException("not implemented"); + } + + public SpanContext fromByteArray(byte[] bytes) { + throw new UnsupportedOperationException("not implemented"); + } +} diff --git a/opentelemetry/src/main/java/io/grpc/opentelemetry/BinaryFormatImpl.java b/opentelemetry/src/main/java/io/grpc/opentelemetry/BinaryFormatImpl.java new file mode 100644 index 00000000000..6f70d789753 --- /dev/null +++ b/opentelemetry/src/main/java/io/grpc/opentelemetry/BinaryFormatImpl.java @@ -0,0 +1,141 @@ +/* + * Copyright 2024 The gRPC 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 io.grpc.opentelemetry; + + +import static com.google.common.base.Preconditions.checkNotNull; + +import io.opentelemetry.api.trace.SpanContext; +import io.opentelemetry.api.trace.SpanId; +import io.opentelemetry.api.trace.TraceFlags; +import io.opentelemetry.api.trace.TraceId; +import io.opentelemetry.api.trace.TraceState; +import java.util.Arrays; + +/** + * Binary encoded {@link SpanContext} for context propagation. This is adapted from OpenCensus + * binary format. + * + *

BinaryFormat format: + * + *

+ */ +final class BinaryFormatImpl extends BinaryFormat { + private static final byte VERSION_ID = 0; + private static final int VERSION_ID_OFFSET = 0; + private static final byte ID_SIZE = 1; + private static final byte TRACE_ID_FIELD_ID = 0; + + private static final int TRACE_ID_FIELD_ID_OFFSET = VERSION_ID_OFFSET + ID_SIZE; + private static final int TRACE_ID_OFFSET = TRACE_ID_FIELD_ID_OFFSET + ID_SIZE; + private static final int TRACE_ID_SIZE = TraceId.getLength() / 2; + + private static final byte SPAN_ID_FIELD_ID = 1; + private static final int SPAN_ID_FIELD_ID_OFFSET = TRACE_ID_OFFSET + TRACE_ID_SIZE; + private static final int SPAN_ID_OFFSET = SPAN_ID_FIELD_ID_OFFSET + ID_SIZE; + private static final int SPAN_ID_SIZE = SpanId.getLength() / 2; + + private static final byte TRACE_FLAG_FIELD_ID = 2; + private static final int TRACE_FLAG_FIELD_ID_OFFSET = SPAN_ID_OFFSET + SPAN_ID_SIZE; + private static final int TRACE_FLAG_OFFSET = TRACE_FLAG_FIELD_ID_OFFSET + ID_SIZE; + private static final int REQUIRED_FORMAT_LENGTH = 3 * ID_SIZE + TRACE_ID_SIZE + SPAN_ID_SIZE; + private static final int TRACE_FLAG_SIZE = TraceFlags.getLength() / 2; + private static final int ALL_FORMAT_LENGTH = REQUIRED_FORMAT_LENGTH + ID_SIZE + TRACE_FLAG_SIZE; + + private static final BinaryFormatImpl INSTANCE = new BinaryFormatImpl(); + + public static BinaryFormatImpl getInstance() { + return INSTANCE; + } + + @Override + public byte[] toByteArray(SpanContext spanContext) { + checkNotNull(spanContext, "spanContext"); + byte[] bytes = new byte[ALL_FORMAT_LENGTH]; + bytes[VERSION_ID_OFFSET] = VERSION_ID; + bytes[TRACE_ID_FIELD_ID_OFFSET] = TRACE_ID_FIELD_ID; + System.arraycopy(spanContext.getTraceIdBytes(), 0, bytes, TRACE_ID_OFFSET, TRACE_ID_SIZE); + bytes[SPAN_ID_FIELD_ID_OFFSET] = SPAN_ID_FIELD_ID; + System.arraycopy(spanContext.getSpanIdBytes(), 0, bytes, SPAN_ID_OFFSET, SPAN_ID_SIZE); + bytes[TRACE_FLAG_FIELD_ID_OFFSET] = TRACE_FLAG_FIELD_ID; + bytes[TRACE_FLAG_OFFSET] = spanContext.getTraceFlags().asByte(); + return bytes; + } + + @Override + public SpanContext fromByteArray(byte[] bytes) { + checkNotNull(bytes, "bytes"); + if (bytes.length == 0 || bytes[0] != VERSION_ID) { + throw new IllegalArgumentException("Unsupported version."); + } + if (bytes.length < REQUIRED_FORMAT_LENGTH) { + throw new IllegalArgumentException("Invalid input: truncated"); + } + String traceId; + String spanId; + TraceFlags traceFlags = TraceFlags.getDefault(); + int pos = 1; + if (bytes[pos] == TRACE_ID_FIELD_ID) { + traceId = TraceId.fromBytes( + Arrays.copyOfRange(bytes, pos + ID_SIZE, pos + ID_SIZE + TRACE_ID_SIZE)); + pos += ID_SIZE + TRACE_ID_SIZE; + } else { + throw new IllegalArgumentException("Invalid input: expected trace ID at offset " + pos); + } + if (bytes[pos] == SPAN_ID_FIELD_ID) { + spanId = SpanId.fromBytes( + Arrays.copyOfRange(bytes, pos + ID_SIZE, pos + ID_SIZE + SPAN_ID_SIZE)); + pos += ID_SIZE + SPAN_ID_SIZE; + } else { + throw new IllegalArgumentException("Invalid input: expected span ID at offset " + pos); + } + if (bytes.length > pos && bytes[pos] == TRACE_FLAG_FIELD_ID) { + if (bytes.length < ALL_FORMAT_LENGTH) { + throw new IllegalArgumentException("Invalid input: truncated"); + } + traceFlags = TraceFlags.fromByte(bytes[pos + ID_SIZE]); + } + return SpanContext.create(traceId, spanId, traceFlags, TraceState.getDefault()); + } +} diff --git a/opentelemetry/src/main/java/io/grpc/opentelemetry/GrpcTraceBinContextPropagator.java b/opentelemetry/src/main/java/io/grpc/opentelemetry/GrpcTraceBinContextPropagator.java new file mode 100644 index 00000000000..c3017d5170f --- /dev/null +++ b/opentelemetry/src/main/java/io/grpc/opentelemetry/GrpcTraceBinContextPropagator.java @@ -0,0 +1,135 @@ +/* + * Copyright 2024 The gRPC 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 io.grpc.opentelemetry; + + +import static com.google.common.base.Preconditions.checkNotNull; + +import com.google.common.annotations.VisibleForTesting; +import com.google.common.io.BaseEncoding; +import io.grpc.ExperimentalApi; +import io.grpc.Metadata; +import io.opentelemetry.api.trace.Span; +import io.opentelemetry.api.trace.SpanContext; +import io.opentelemetry.context.Context; +import io.opentelemetry.context.propagation.TextMapGetter; +import io.opentelemetry.context.propagation.TextMapPropagator; +import io.opentelemetry.context.propagation.TextMapSetter; +import java.util.Collection; +import java.util.Collections; +import java.util.logging.Level; +import java.util.logging.Logger; +import javax.annotation.Nullable; + +/** + * A {@link TextMapPropagator} for transmitting "grpc-trace-bin" span context. + * + *

This propagator can transmit the "grpc-trace-bin" context in either binary or Base64-encoded + * text format, depending on the capabilities of the provided {@link TextMapGetter} and + * {@link TextMapSetter}. + * + *

If the {@code TextMapGetter} and {@code TextMapSetter} only support text format, Base64 + * encoding and decoding will be used when communicating with the carrier API. But gRPC uses + * it with gRPC's metadata-based getter/setter, and the propagator can directly transmit the binary + * header, avoiding the need for Base64 encoding. + */ + +@ExperimentalApi("https://github.com/grpc/grpc-java/issues/11400") +public final class GrpcTraceBinContextPropagator implements TextMapPropagator { + private static final Logger log = Logger.getLogger(GrpcTraceBinContextPropagator.class.getName()); + public static final String GRPC_TRACE_BIN_HEADER = "grpc-trace-bin"; + private final BinaryFormat binaryFormat; + private static final GrpcTraceBinContextPropagator INSTANCE = + new GrpcTraceBinContextPropagator(BinaryFormatImpl.getInstance()); + + public static GrpcTraceBinContextPropagator defaultInstance() { + return INSTANCE; + } + + @VisibleForTesting + GrpcTraceBinContextPropagator(BinaryFormat binaryFormat) { + this.binaryFormat = checkNotNull(binaryFormat, "binaryFormat"); + } + + @Override + public Collection fields() { + return Collections.singleton(GRPC_TRACE_BIN_HEADER); + } + + @Override + public void inject(Context context, @Nullable C carrier, TextMapSetter setter) { + if (context == null || setter == null) { + return; + } + SpanContext spanContext = Span.fromContext(context).getSpanContext(); + if (!spanContext.isValid()) { + return; + } + try { + byte[] b = binaryFormat.toByteArray(spanContext); + if (setter instanceof MetadataSetter) { + ((MetadataSetter) setter).set((Metadata) carrier, GRPC_TRACE_BIN_HEADER, b); + } else { + setter.set(carrier, GRPC_TRACE_BIN_HEADER, BaseEncoding.base64().encode(b)); + } + } catch (Exception e) { + log.log(Level.FINE, "Set grpc-trace-bin spanContext failed", e); + } + } + + @Override + public Context extract(Context context, @Nullable C carrier, TextMapGetter getter) { + if (context == null) { + return Context.root(); + } + if (getter == null) { + return context; + } + byte[] b; + if (getter instanceof MetadataGetter) { + b = ((MetadataGetter) getter).getBinary((Metadata) carrier, GRPC_TRACE_BIN_HEADER); + if (b == null) { + log.log(Level.FINE, "No grpc-trace-bin present in carrier"); + return context; + } + } else { + String value = getter.get(carrier, GRPC_TRACE_BIN_HEADER); + if (value == null) { + log.log(Level.FINE, "No grpc-trace-bin present in carrier"); + return context; + } + try { + b = BaseEncoding.base64().decode(value); + } catch (Exception e) { + log.log(Level.FINE, "Base64-decode spanContext bytes failed"); + return context; + } + } + + SpanContext spanContext; + try { + spanContext = binaryFormat.fromByteArray(b); + } catch (Exception e) { + log.log(Level.FINE, "Failed to parse tracing header", e); + return context; + } + if (!spanContext.isValid()) { + return context; + } + return context.with(Span.wrap(spanContext)); + } +} diff --git a/opentelemetry/src/main/java/io/grpc/opentelemetry/MetadataGetter.java b/opentelemetry/src/main/java/io/grpc/opentelemetry/MetadataGetter.java new file mode 100644 index 00000000000..b9110e2d402 --- /dev/null +++ b/opentelemetry/src/main/java/io/grpc/opentelemetry/MetadataGetter.java @@ -0,0 +1,64 @@ +/* + * Copyright 2024 The gRPC 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 io.grpc.opentelemetry; + + +import io.grpc.Metadata; +import io.opentelemetry.context.propagation.TextMapGetter; +import java.util.logging.Level; +import java.util.logging.Logger; +import javax.annotation.Nullable; + +/** + * A TextMapGetter that reads value from gRPC {@link Metadata}. Supports both text and binary + * headers. Supporting binary header is an optimization path for GrpcTraceBinContextPropagator + * to work around the lack of binary propagator API and thus avoid + * base64 (de)encoding when passing data between propagator API interfaces. + */ +final class MetadataGetter implements TextMapGetter { + private static final Logger logger = Logger.getLogger(MetadataGetter.class.getName()); + + private static final MetadataGetter INSTANCE = new MetadataGetter(); + + public static MetadataGetter getInstance() { + return INSTANCE; + } + + @Override + public Iterable keys(Metadata carrier) { + return carrier.keys(); + } + + @Nullable + @Override + public String get(@Nullable Metadata carrier, String key) { + if (carrier == null) { + logger.log(Level.FINE, "Carrier is null, getting no data"); + return null; + } + return carrier.get(Metadata.Key.of(key, Metadata.ASCII_STRING_MARSHALLER)); + } + + @Nullable + public byte[] getBinary(@Nullable Metadata carrier, String key) { + if (carrier == null) { + logger.log(Level.FINE, "Carrier is null, getting no data"); + return null; + } + return carrier.get(Metadata.Key.of(key, Metadata.BINARY_BYTE_MARSHALLER)); + } +} diff --git a/opentelemetry/src/main/java/io/grpc/opentelemetry/MetadataSetter.java b/opentelemetry/src/main/java/io/grpc/opentelemetry/MetadataSetter.java new file mode 100644 index 00000000000..af5ad1d46e7 --- /dev/null +++ b/opentelemetry/src/main/java/io/grpc/opentelemetry/MetadataSetter.java @@ -0,0 +1,61 @@ +/* + * Copyright 2024 The gRPC 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 io.grpc.opentelemetry; + + +import io.grpc.Metadata; +import io.opentelemetry.context.propagation.TextMapSetter; +import java.util.logging.Level; +import java.util.logging.Logger; +import javax.annotation.Nullable; + +/** + * A {@link TextMapSetter} that sets value to gRPC {@link Metadata}. Supports both text and binary + * headers. Supporting binary header is an optimization path for GrpcTraceBinContextPropagator + * to work around the lack of binary propagator API and thus avoid + * base64 (de)encoding when passing data between propagator API interfaces. + */ +final class MetadataSetter implements TextMapSetter { + private static final Logger logger = Logger.getLogger(MetadataSetter.class.getName()); + private static final MetadataSetter INSTANCE = new MetadataSetter(); + + public static MetadataSetter getInstance() { + return INSTANCE; + } + + @Override + public void set(@Nullable Metadata carrier, String key, String value) { + if (carrier == null) { + logger.log(Level.FINE, "Carrier is null, setting no data"); + return; + } + assert !key.endsWith("bin"); + carrier.put(Metadata.Key.of(key, Metadata.ASCII_STRING_MARSHALLER), value); + } + + void set(@Nullable Metadata carrier, String key, byte[] value) { + if (carrier == null) { + logger.log(Level.FINE, "Carrier is null, setting no data"); + return; + } + assert key.endsWith("bin"); + if (!key.equals("grpc-trace-bin")) { + throw new IllegalArgumentException("Only support 'grpc-trace-bin' binary header"); + } + carrier.put(Metadata.Key.of(key, Metadata.BINARY_BYTE_MARSHALLER), value); + } +} diff --git a/opentelemetry/src/test/java/io/grpc/opentelemetry/GrpcTraceBinContextPropagatorTest.java b/opentelemetry/src/test/java/io/grpc/opentelemetry/GrpcTraceBinContextPropagatorTest.java new file mode 100644 index 00000000000..53a6f125045 --- /dev/null +++ b/opentelemetry/src/test/java/io/grpc/opentelemetry/GrpcTraceBinContextPropagatorTest.java @@ -0,0 +1,303 @@ +/* + * Copyright 2024 The gRPC 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 io.grpc.opentelemetry; + +import static com.google.common.truth.Truth.assertThat; +import static org.junit.Assert.assertTrue; + +import com.google.common.collect.ImmutableMap; +import com.google.common.io.BaseEncoding; +import io.grpc.Metadata; +import io.opentelemetry.api.trace.Span; +import io.opentelemetry.api.trace.SpanContext; +import io.opentelemetry.api.trace.TraceFlags; +import io.opentelemetry.api.trace.TraceState; +import io.opentelemetry.context.Context; +import io.opentelemetry.context.propagation.TextMapGetter; +import io.opentelemetry.context.propagation.TextMapSetter; +import java.util.Arrays; +import java.util.HashMap; +import java.util.Map; +import javax.annotation.Nullable; +import org.junit.Test; +import org.junit.runner.RunWith; +import org.junit.runners.JUnit4; + +@RunWith(JUnit4.class) +public class GrpcTraceBinContextPropagatorTest { + private static final String TRACE_ID_BASE16 = "e384981d65129fa3e384981d65129fa3"; + private static final String SPAN_ID_BASE16 = "e384981d65129fa3"; + private static final String TRACE_HEADER_SAMPLED = + "0000" + TRACE_ID_BASE16 + "01" + SPAN_ID_BASE16 + "0201"; + private static final String TRACE_HEADER_NOT_SAMPLED = + "0000" + TRACE_ID_BASE16 + "01" + SPAN_ID_BASE16 + "0200"; + private final String goldenHeaderEncodedSampled = encode(TRACE_HEADER_SAMPLED); + private final String goldenHeaderEncodedNotSampled = encode(TRACE_HEADER_NOT_SAMPLED); + private static final TextMapSetter> setter = Map::put; + private static final TextMapGetter> getter = + new TextMapGetter>() { + @Override + public Iterable keys(Map carrier) { + return carrier.keySet(); + } + + @Nullable + @Override + public String get(Map carrier, String key) { + return carrier.get(key); + } + }; + private final GrpcTraceBinContextPropagator grpcTraceBinContextPropagator = + GrpcTraceBinContextPropagator.defaultInstance(); + + private static Context withSpanContext(SpanContext spanContext, Context context) { + return context.with(Span.wrap(spanContext)); + } + + private static SpanContext getSpanContext(Context context) { + return Span.fromContext(context).getSpanContext(); + } + + @Test + public void inject_map_Nothing() { + Map carrier = new HashMap<>(); + grpcTraceBinContextPropagator.inject(Context.current(), carrier, setter); + assertThat(carrier).hasSize(0); + } + + @Test + public void inject_map_invalidSpan() { + Map carrier = new HashMap<>(); + Context context = withSpanContext(SpanContext.getInvalid(), Context.current()); + grpcTraceBinContextPropagator.inject(context, carrier, setter); + assertThat(carrier).isEmpty(); + } + + @Test + public void inject_map_nullCarrier() { + Map carrier = new HashMap<>(); + Context context = + withSpanContext( + SpanContext.create( + TRACE_ID_BASE16, SPAN_ID_BASE16, TraceFlags.getSampled(), TraceState.getDefault()), + Context.current()); + grpcTraceBinContextPropagator.inject(context, null, + (TextMapSetter>) (ignored, key, value) -> carrier.put(key, value)); + assertThat(carrier) + .containsExactly( + GrpcTraceBinContextPropagator.GRPC_TRACE_BIN_HEADER, goldenHeaderEncodedSampled); + } + + @Test + public void inject_map_nullContext() { + Map carrier = new HashMap<>(); + grpcTraceBinContextPropagator.inject(null, carrier, setter); + assertThat(carrier).isEmpty(); + } + + @Test + public void inject_map_invalidBinaryFormat() { + GrpcTraceBinContextPropagator propagator = new GrpcTraceBinContextPropagator( + new BinaryFormat() { + @Override + public byte[] toByteArray(SpanContext spanContext) { + throw new IllegalArgumentException("failed to byte"); + } + }); + Map carrier = new HashMap<>(); + Context context = + withSpanContext( + SpanContext.create( + TRACE_ID_BASE16, SPAN_ID_BASE16, TraceFlags.getSampled(), TraceState.getDefault()), + Context.current()); + propagator.inject(context, carrier, setter); + assertThat(carrier).hasSize(0); + } + + @Test + public void inject_map_SampledContext() { + verify_inject_map(TraceFlags.getSampled(), goldenHeaderEncodedSampled); + } + + @Test + public void inject_map_NotSampledContext() { + verify_inject_map(TraceFlags.getDefault(), goldenHeaderEncodedNotSampled); + } + + private void verify_inject_map(TraceFlags traceFlags, String goldenHeader) { + Map carrier = new HashMap<>(); + Context context = + withSpanContext( + SpanContext.create( + TRACE_ID_BASE16, SPAN_ID_BASE16, traceFlags, TraceState.getDefault()), + Context.current()); + grpcTraceBinContextPropagator.inject(context, carrier, setter); + assertThat(carrier) + .containsExactly( + GrpcTraceBinContextPropagator.GRPC_TRACE_BIN_HEADER, goldenHeader); + } + + @Test + public void extract_map_nothing() { + Map carrier = new HashMap<>(); + assertThat(grpcTraceBinContextPropagator.extract(Context.current(), carrier, getter)) + .isSameInstanceAs(Context.current()); + } + + @Test + public void extract_map_SampledContext() { + verify_extract_map(TraceFlags.getSampled(), goldenHeaderEncodedSampled); + } + + @Test + public void extract_map_NotSampledContext() { + verify_extract_map(TraceFlags.getDefault(), goldenHeaderEncodedNotSampled); + } + + private void verify_extract_map(TraceFlags traceFlags, String goldenHeader) { + Map carrier = ImmutableMap.of( + GrpcTraceBinContextPropagator.GRPC_TRACE_BIN_HEADER, goldenHeader); + Context result = grpcTraceBinContextPropagator.extract(Context.current(), carrier, getter); + assertThat(getSpanContext(result)).isEqualTo(SpanContext.create( + TRACE_ID_BASE16, SPAN_ID_BASE16, traceFlags, TraceState.getDefault())); + } + + @Test + public void inject_metadata_Nothing() { + Metadata carrier = new Metadata(); + grpcTraceBinContextPropagator.inject(Context.current(), carrier, MetadataSetter.getInstance()); + assertThat(carrier.keys()).isEmpty(); + } + + @Test + public void inject_metadata_nullCarrier() { + Context context = + withSpanContext( + SpanContext.create( + TRACE_ID_BASE16, SPAN_ID_BASE16, TraceFlags.getSampled(), TraceState.getDefault()), + Context.current()); + grpcTraceBinContextPropagator.inject(context, null, MetadataSetter.getInstance()); + } + + @Test + public void inject_metadata_invalidSpan() { + Metadata carrier = new Metadata(); + Context context = withSpanContext(SpanContext.getInvalid(), Context.current()); + grpcTraceBinContextPropagator.inject(context, carrier, MetadataSetter.getInstance()); + assertThat(carrier.keys()).isEmpty(); + } + + @Test + public void inject_metadata_SampledContext() { + verify_inject_metadata(TraceFlags.getSampled(), hexStringToByteArray(TRACE_HEADER_SAMPLED)); + } + + @Test + public void inject_metadataSetter_NotSampledContext() { + verify_inject_metadata(TraceFlags.getDefault(), hexStringToByteArray(TRACE_HEADER_NOT_SAMPLED)); + } + + private void verify_inject_metadata(TraceFlags traceFlags, byte[] bytes) { + Metadata metadata = new Metadata(); + Context context = + withSpanContext( + SpanContext.create( + TRACE_ID_BASE16, SPAN_ID_BASE16, traceFlags, TraceState.getDefault()), + Context.current()); + grpcTraceBinContextPropagator.inject(context, metadata, MetadataSetter.getInstance()); + byte[] injected = metadata.get(Metadata.Key.of( + GrpcTraceBinContextPropagator.GRPC_TRACE_BIN_HEADER, Metadata.BINARY_BYTE_MARSHALLER)); + assertTrue(Arrays.equals(injected, bytes)); + } + + @Test + public void extract_metadata_nothing() { + assertThat(grpcTraceBinContextPropagator.extract( + Context.current(), new Metadata(), MetadataGetter.getInstance())) + .isSameInstanceAs(Context.current()); + } + + @Test + public void extract_metadata_nullCarrier() { + assertThat(grpcTraceBinContextPropagator.extract( + Context.current(), null, MetadataGetter.getInstance())) + .isSameInstanceAs(Context.current()); + } + + @Test + public void extract_metadata_SampledContext() { + verify_extract_metadata(TraceFlags.getSampled(), TRACE_HEADER_SAMPLED); + } + + @Test + public void extract_metadataGetter_NotSampledContext() { + verify_extract_metadata(TraceFlags.getDefault(), TRACE_HEADER_NOT_SAMPLED); + } + + private void verify_extract_metadata(TraceFlags traceFlags, String hex) { + Metadata carrier = new Metadata(); + carrier.put(Metadata.Key.of( + GrpcTraceBinContextPropagator.GRPC_TRACE_BIN_HEADER, Metadata.BINARY_BYTE_MARSHALLER), + hexStringToByteArray(hex)); + Context result = grpcTraceBinContextPropagator.extract(Context.current(), carrier, + MetadataGetter.getInstance()); + assertThat(getSpanContext(result)).isEqualTo(SpanContext.create( + TRACE_ID_BASE16, SPAN_ID_BASE16, traceFlags, TraceState.getDefault())); + } + + @Test + public void extract_metadata_invalidBinaryFormat() { + GrpcTraceBinContextPropagator propagator = new GrpcTraceBinContextPropagator( + new BinaryFormat() { + @Override + public SpanContext fromByteArray(byte[] bytes) { + throw new IllegalArgumentException("failed to byte"); + } + }); + Metadata carrier = new Metadata(); + carrier.put(Metadata.Key.of( + GrpcTraceBinContextPropagator.GRPC_TRACE_BIN_HEADER, Metadata.BINARY_BYTE_MARSHALLER), + hexStringToByteArray(TRACE_HEADER_SAMPLED)); + assertThat(propagator.extract(Context.current(), carrier, MetadataGetter.getInstance())) + .isSameInstanceAs(Context.current()); + } + + @Test + public void extract_metadata_invalidBinaryFormatVersion() { + Metadata carrier = new Metadata(); + carrier.put(Metadata.Key.of( + GrpcTraceBinContextPropagator.GRPC_TRACE_BIN_HEADER, Metadata.BINARY_BYTE_MARSHALLER), + hexStringToByteArray("0100" + TRACE_ID_BASE16 + "01" + SPAN_ID_BASE16 + "0201")); + assertThat(grpcTraceBinContextPropagator.extract( + Context.current(), carrier, MetadataGetter.getInstance())) + .isSameInstanceAs(Context.current()); + } + + private static String encode(String hex) { + return BaseEncoding.base64().encode(hexStringToByteArray(hex)); + } + + private static byte[] hexStringToByteArray(String s) { + int len = s.length(); + byte[] data = new byte[len / 2]; + for (int i = 0; i < len; i += 2) { + data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4) + + Character.digit(s.charAt(i + 1), 16)); + } + return data; + } +} diff --git a/opentelemetry/src/test/java/io/grpc/opentelemetry/MetadataGetterTest.java b/opentelemetry/src/test/java/io/grpc/opentelemetry/MetadataGetterTest.java new file mode 100644 index 00000000000..0879e1f0ac1 --- /dev/null +++ b/opentelemetry/src/test/java/io/grpc/opentelemetry/MetadataGetterTest.java @@ -0,0 +1,69 @@ +/* + * Copyright 2024 The gRPC 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 io.grpc.opentelemetry; + +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertFalse; +import static org.junit.Assert.assertNull; +import static org.junit.Assert.assertTrue; + +import io.grpc.Metadata; +import java.nio.charset.Charset; +import java.util.Arrays; +import java.util.Iterator; +import org.junit.Test; +import org.junit.runner.RunWith; +import org.junit.runners.JUnit4; + +@RunWith(JUnit4.class) +public class MetadataGetterTest { + private final MetadataGetter metadataGetter = MetadataGetter.getInstance(); + + @Test + public void getBinary() { + Metadata metadata = new Metadata(); + byte[] b = "generated".getBytes(Charset.defaultCharset()); + Metadata.Key grpc_trace_bin_key = + Metadata.Key.of("grpc-trace-bin", Metadata.BINARY_BYTE_MARSHALLER); + metadata.put(grpc_trace_bin_key, b); + assertTrue(Arrays.equals(b, metadataGetter.getBinary(metadata, "grpc-trace-bin"))); + } + + @Test + public void getNullBinary() { + assertNull(metadataGetter.getBinary(new Metadata(), "grpc-trace-bin")); + } + + @Test + public void getNullText() { + assertNull(metadataGetter.get(new Metadata(), "a-key")); + } + + @Test + public void getText() { + Metadata metadata = new Metadata(); + Metadata.Key other_key = + Metadata.Key.of("other", Metadata.ASCII_STRING_MARSHALLER); + metadata.put(other_key, "header-value"); + assertEquals("header-value", metadataGetter.get(metadata, "other")); + + Iterator iterator = metadataGetter.keys(metadata).iterator(); + assertTrue(iterator.hasNext()); + assertEquals("other", iterator.next()); + assertFalse(iterator.hasNext()); + } +} diff --git a/opentelemetry/src/test/java/io/grpc/opentelemetry/MetadataSetterTest.java b/opentelemetry/src/test/java/io/grpc/opentelemetry/MetadataSetterTest.java new file mode 100644 index 00000000000..4f8344dd55f --- /dev/null +++ b/opentelemetry/src/test/java/io/grpc/opentelemetry/MetadataSetterTest.java @@ -0,0 +1,61 @@ +/* + * Copyright 2024 The gRPC 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 io.grpc.opentelemetry; + +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertTrue; + +import io.grpc.Metadata; +import java.nio.charset.Charset; +import java.util.Arrays; +import org.junit.Test; +import org.junit.runner.RunWith; +import org.junit.runners.JUnit4; + +@RunWith(JUnit4.class) +public class MetadataSetterTest { + private final MetadataSetter metadataSetter = MetadataSetter.getInstance(); + + @Test + public void setGrpcTraceBin() { + Metadata metadata = new Metadata(); + byte[] b = "generated".getBytes(Charset.defaultCharset()); + Metadata.Key grpc_trace_bin_key = + Metadata.Key.of("grpc-trace-bin", Metadata.BINARY_BYTE_MARSHALLER); + metadataSetter.set(metadata, "grpc-trace-bin", b); + assertTrue(Arrays.equals(b, metadata.get(grpc_trace_bin_key))); + } + + @Test(expected = IllegalArgumentException.class) + public void setOtherBinaryKey() { + Metadata metadata = new Metadata(); + byte[] b = "generated".getBytes(Charset.defaultCharset()); + Metadata.Key other_key = + Metadata.Key.of("for-test", Metadata.BINARY_BYTE_MARSHALLER); + metadataSetter.set(metadata, other_key.name(), b); + } + + @Test + public void setText() { + Metadata metadata = new Metadata(); + String v = "generated"; + Metadata.Key textKey = + Metadata.Key.of("text-key", Metadata.ASCII_STRING_MARSHALLER); + metadataSetter.set(metadata, textKey.name(), v); + assertEquals(metadata.get(textKey), v); + } +}