Handles.java example

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solder-master
/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011, Red Hat, Inc., and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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 org.jboss.solder.exception.control;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Marker annotation for a method to be considered an Exception Handler. Handlers are typically in the form of
 * <code>public void ... (@Handles ... CaughtException<...> ...)</code> methods. If a method has a return type, it is
 * ignored.
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.PARAMETER)
@Documented
public @interface Handles {
    /**
     * Direction of the cause chain traversal to listen.
     */
    public abstract TraversalMode during() default TraversalMode.DEPTH_FIRST;

    /**
     * Precedence relative to handlers for the same type
     */
    public abstract int precedence() default Precedence.DEFAULT;
}