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ThreadPriorityContextProvider.java
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ThreadPriorityContextProvider.java
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/*
* Copyright (c) 2018,2019 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* 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.eclipse.microprofile.context.tck.contexts.priority.spi;
import java.util.Map;
import org.eclipse.microprofile.context.spi.ThreadContextProvider;
import org.eclipse.microprofile.context.spi.ThreadContextSnapshot;
/**
* This is an example context type that is created by the test suite.
* This context type captures/clears/propagates/restores thread priority (java.lang.Thread.get/setPriority).
* This is chosen, not because it is useful in any way, but because the concept of thread priority is simple,
* well understood, and already built into Java.
*/
public class ThreadPriorityContextProvider implements ThreadContextProvider {
public static final String THREAD_PRIORITY = "ThreadPriority";
/**
* Thread priority context is considered cleared by resetting to normal priority (Thread.NORM_PRIORITY).
*/
@Override
public ThreadContextSnapshot clearedContext(Map<String, String> props) {
return new ThreadPrioritySnapshot(Thread.NORM_PRIORITY);
}
/**
* Save the current thread priority.
*/
@Override
public ThreadContextSnapshot currentContext(Map<String, String> props) {
return new ThreadPrioritySnapshot(Thread.currentThread().getPriority());
}
@Override
public String getThreadContextType() {
return THREAD_PRIORITY;
}
}