/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.
*/
package org.elasticsearch.cloud.gce.util;
import org.elasticsearch.SpecialPermission;
import java.io.IOException;
import java.net.SocketPermission;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
/**
* GCE's HTTP client changes access levels. Specifically it needs {@link RuntimePermission} {@code
* accessDeclaredMembers} and {@code setFactory}, and {@link java.lang.reflect.ReflectPermission}
* {@code suppressAccessChecks}. For remote calls, the plugin needs {@link SocketPermission} for
* {@code connect}. This class wraps the operations requiring access in
* {@link AccessController#doPrivileged(PrivilegedAction)} blocks.
*/
public final class Access {
private Access() {}
public static <T> T doPrivileged(final PrivilegedAction<T> operation) {
SpecialPermission.check();
return AccessController.doPrivileged(operation);
}
public static void doPrivilegedVoid(final Runnable action) {
SpecialPermission.check();
AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
action.run();
return null;
});
}
public static <T> T doPrivilegedIOException(final PrivilegedExceptionAction<T> operation)
throws IOException {
SpecialPermission.check();
try {
return AccessController.doPrivileged(operation);
} catch (final PrivilegedActionException e) {
throw (IOException) e.getCause();
}
}
}