/
StringContextProvider.java
107 lines (79 loc) · 3.12 KB
/
StringContextProvider.java
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/*
* Copyright (c) 2023 Eclipse Foundation and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.main.test.app.concurrency.executor;
import jakarta.enterprise.concurrent.spi.ThreadContextProvider;
import jakarta.enterprise.concurrent.spi.ThreadContextRestorer;
import jakarta.enterprise.concurrent.spi.ThreadContextSnapshot;
import java.lang.System.Logger;
import java.util.Map;
import static java.lang.System.Logger.Level.INFO;
public class StringContextProvider implements ThreadContextProvider {
@Override
public ThreadContextSnapshot currentContext(Map<String, String> props) {
return new StringContextSnapshot(StringContext.get());
}
@Override
public ThreadContextSnapshot clearedContext(Map<String, String> props) {
return new StringContextSnapshot("");
}
@Override
public String getThreadContextType() {
return StringContext.class.getSimpleName();
}
private class StringContextSnapshot implements ThreadContextSnapshot {
private final String contextSnapshot;
StringContextSnapshot(final String snapshot) {
contextSnapshot = snapshot;
}
@Override
public ThreadContextRestorer begin() {
ThreadContextRestorer restorer = new StringContextRestorer(StringContext.get());
StringContext.set(contextSnapshot);
return restorer;
}
}
private static class StringContextRestorer implements ThreadContextRestorer {
private final String contextToRestore;
private boolean restored;
StringContextRestorer(final String toRestore) {
contextToRestore = toRestore;
}
@Override
public void endContext() throws IllegalStateException {
if (restored) {
throw new IllegalStateException("already restored");
}
StringContext.set(contextToRestore);
restored = true;
}
}
public static class StringContext {
private static final Logger LOG = System.getLogger(StringContext.class.getName());
private static final ThreadLocal<String> local = new ThreadLocal<>();
public static String get() {
LOG.log(INFO, "get()");
return local.get();
}
public static void set(final String value) {
LOG.log(INFO, "set(value={0})", value);
if (value == null) {
local.remove();
} else {
local.set(value);
}
}
}
}