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/*
* Copyright (c) 2020-2021 VMware Inc. or its affiliates, All Rights Reserved.
*
* 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
*
* https://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 reactor.tools.agent;
import java.util.concurrent.atomic.AtomicBoolean;
import net.bytebuddy.jar.asm.ClassVisitor;
import net.bytebuddy.jar.asm.MethodVisitor;
import net.bytebuddy.jar.asm.Opcodes;
import net.bytebuddy.jar.asm.Type;
class ReactorDebugClassVisitor extends ClassVisitor {
private final AtomicBoolean changed;
private String currentClassName;
private String currentSource;
ReactorDebugClassVisitor(ClassVisitor classVisitor, AtomicBoolean changed) {
super(Opcodes.ASM9, classVisitor);
this.changed = changed;
}
@Override
public void visitSource(String source, String debug) {
super.visitSource(source, debug);
currentSource = source;
}
@Override
public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
super.visit(version, access, name, signature, superName, interfaces);
currentClassName = name;
}
@Override
public MethodVisitor visitMethod(int access, String currentMethod, String descriptor, String signature, String[] exceptions) {
MethodVisitor visitor = super.visitMethod(access, currentMethod, descriptor, signature, exceptions);
if (currentClassName.contains("CGLIB$$")) {
return visitor;
}
String returnType = Type.getReturnType(descriptor).getInternalName();
switch (returnType) {
// Handle every core publisher type.
// Note that classes like `GroupedFlux` or `ConnectableFlux` are not included,
// because they don't have a type-preserving "checkpoint" method
case "reactor/core/publisher/Flux":
case "reactor/core/publisher/Mono":
case "reactor/core/publisher/ParallelFlux":
visitor = new ReturnHandlingMethodVisitor(visitor, returnType, currentClassName, currentMethod, currentSource,
changed);
}
return new CallSiteInfoAddingMethodVisitor(visitor, currentClassName, currentMethod, currentSource, changed);
}
}
