io.shardingsphere.opentracing.ShardingTracer Maven / Gradle / Ivy
/*
* Copyright 2016-2018 shardingsphere.io.
*
* 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.shardingsphere.opentracing;
import com.google.common.base.Preconditions;
import io.opentracing.Tracer;
import io.opentracing.util.GlobalTracer;
import io.shardingsphere.core.exception.ShardingException;
import io.shardingsphere.opentracing.listener.execution.SQLExecuteEventListener;
import io.shardingsphere.opentracing.listener.execution.OverallExecuteEventListener;
import io.shardingsphere.opentracing.listener.merger.MergeEventListener;
import io.shardingsphere.opentracing.listener.routing.RouteEventListener;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;
/**
* Sharding tracer object container.
*
* @author gaohongtao
* @author wangkai
*/
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public final class ShardingTracer {
private static final String OPENTRACING_TRACER_CLASS_NAME = "shardingsphere.opentracing.tracer.class";
/**
* Initialize sharding tracer.
*/
public static void init() {
String tracerClassName = System.getProperty(OPENTRACING_TRACER_CLASS_NAME);
Preconditions.checkNotNull(tracerClassName, "Can not find opentracing tracer implementation class.");
try {
init((Tracer) Class.forName(tracerClassName).newInstance());
} catch (final ReflectiveOperationException ex) {
throw new ShardingException("Initialize opentracing tracer class failure.", ex);
}
}
/**
* Initialize sharding tracer.
*
* @param tracer opentracing tracer
*/
public static void init(final Tracer tracer) {
if (!GlobalTracer.isRegistered()) {
GlobalTracer.register(tracer);
registerListeners();
}
}
private static void registerListeners() {
new RouteEventListener().register();
new OverallExecuteEventListener().register();
new SQLExecuteEventListener().register();
new MergeEventListener().register();
}
/**
* Get tracer.
*
* @return tracer
*/
public static Tracer get() {
return GlobalTracer.get();
}
}