/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 *
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package org.apache.skywalking.apm.plugin.grpc.v1.client;

import io.grpc.Channel;
import io.grpc.MethodDescriptor;
import org.apache.skywalking.apm.agent.core.context.ContextManager;
import org.apache.skywalking.apm.agent.core.context.trace.AbstractSpan;
import org.apache.skywalking.apm.agent.core.context.trace.SpanLayer;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.MethodInterceptResult;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.StaticMethodsAroundInterceptor;
import org.apache.skywalking.apm.network.trace.component.ComponentsDefine;

import java.lang.reflect.Method;

import static org.apache.skywalking.apm.plugin.grpc.v1.Constants.BLOCKING_CALL_EXIT_SPAN;
import static org.apache.skywalking.apm.plugin.grpc.v1.OperationNameFormatUtil.formatOperationName;

public class BlockingCallInterceptor implements StaticMethodsAroundInterceptor {

    @Override
    public void beforeMethod(Class clazz, Method method, Object[] allArguments, Class<?>[] parameterTypes,
        MethodInterceptResult result) {
        Channel channel = (Channel) allArguments[0];
        MethodDescriptor<?, ?> methodDescriptor = (MethodDescriptor<?, ?>) allArguments[1];
        final AbstractSpan span = ContextManager.createExitSpan(formatOperationName(methodDescriptor), channel.authority());
        span.setComponent(ComponentsDefine.GRPC);
        span.setLayer(SpanLayer.RPC_FRAMEWORK);
        ContextManager.getRuntimeContext().put(BLOCKING_CALL_EXIT_SPAN, span);
    }

    @Override
    public Object afterMethod(Class clazz, Method method, Object[] allArguments, Class<?>[] parameterTypes,
        Object ret) {
        ContextManager.stopSpan();
        return ret;
    }

    @Override
    public void handleMethodException(Class clazz, Method method, Object[] allArguments, Class<?>[] parameterTypes,
        Throwable t) {
        ContextManager.activeSpan().log(t);
    }
}
