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Helidon Database Client Tracing Support
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/*
* Copyright (c) 2019, 2023 Oracle and/or its affiliates.
*
* 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.helidon.dbclient.tracing;
import java.util.Map;
import io.helidon.common.config.Config;
import io.helidon.common.context.Context;
import io.helidon.dbclient.DbClientServiceBase;
import io.helidon.dbclient.DbClientServiceContext;
import io.helidon.tracing.Span;
import io.helidon.tracing.SpanContext;
import io.helidon.tracing.Tag;
import io.helidon.tracing.Tracer;
import io.helidon.tracing.config.SpanTracingConfig;
import io.helidon.tracing.config.TracingConfigUtil;
/**
* Tracing interceptor.
* This interceptor is added through Java Service loader.
*/
public class DbClientTracing extends DbClientServiceBase {
private static final Tag super String> DBCLIENT_TAG = Tag.COMPONENT.create("dbclient");
private DbClientTracing(Builder builder) {
super(builder);
}
/**
* Create a new tracing interceptor based on the configuration.
*
* @param config configuration node for this interceptor
* @return a new tracing interceptor
*/
public static DbClientTracing create(Config config) {
return builder().config(config).build();
}
/**
* Create a new interceptor to trace requests.
* @return a new tracing interceptor
*/
public static DbClientTracing create() {
return builder().build();
}
/**
* Create a new builder.
*
* @return a new builder instance
*/
public static Builder builder() {
return new Builder();
}
@Override
protected DbClientServiceContext apply(DbClientServiceContext serviceContext) {
SpanTracingConfig spanConfig = TracingConfigUtil.spanConfig("dbclient", "statement");
if (!spanConfig.enabled()) {
return serviceContext;
}
Context context = serviceContext.context();
@SuppressWarnings("resource") Tracer tracer = context.get(Tracer.class).orElseGet(Tracer::global);
// now if span context is missing, we build a span without a parent
Span.Builder> spanBuilder = tracer.spanBuilder(serviceContext.statementName());
context.get(SpanContext.class)
.ifPresent(spanBuilder::parent);
Span span = spanBuilder.start();
span.tag("db.operation", serviceContext.statementType().toString());
if (spanConfig.logEnabled("statement", true)) {
Tag.DB_STATEMENT.create(serviceContext.statement()).apply(span);
}
DBCLIENT_TAG.apply(span);
Tag.DB_TYPE.create(serviceContext.dbType()).apply(span);
serviceContext.statementFuture().thenAccept(nothing -> {
if (spanConfig.logEnabled("statement-finish", true)) {
span.addEvent("log", Map.of("type", "statement"));
}
});
serviceContext.resultFuture().thenAccept(count -> {
if (spanConfig.logEnabled("result-finish", true)) {
span.addEvent("log", Map.of("type", "result",
"count", count));
}
span.end();
}).exceptionally(throwable -> {
span.end(throwable);
return null;
});
return serviceContext;
}
/**
* Fluent API builder for {@link DbClientTracing}.
*/
public static class Builder extends BuilderBase {
private Builder() {
}
@Override
public DbClientTracing build() {
return new DbClientTracing(this);
}
}
}
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