| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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.apache.directory.server.ldap.handlers; |
| |
| |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.directory.api.ldap.model.cursor.ClosureMonitor; |
| import org.apache.directory.api.ldap.model.cursor.CursorClosedException; |
| import org.apache.directory.api.ldap.model.exception.LdapTimeLimitExceededException; |
| import org.apache.directory.server.i18n.I18n; |
| |
| |
| /** |
| * A ClosureMonitor implementation which takes into account a time limit. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class SearchTimeLimitingMonitor implements ClosureMonitor |
| { |
| private final long startTime = System.currentTimeMillis(); |
| private final long millisToLive; |
| |
| private boolean closed; |
| private Exception cause; |
| |
| |
| /** |
| * Creates a new instance of SearchTimeLimitingMonitor. |
| * |
| * @param timeToLive the time before changing state to closed. |
| * @param unit the time units for the timeToLive parameter |
| * @see TimeUnit |
| */ |
| public SearchTimeLimitingMonitor( long timeToLive, TimeUnit unit ) |
| { |
| switch ( unit ) |
| { |
| case MICROSECONDS: |
| this.millisToLive = timeToLive / 1000; |
| break; |
| case MILLISECONDS: |
| this.millisToLive = timeToLive; |
| break; |
| case SECONDS: |
| this.millisToLive = timeToLive * 1000; |
| break; |
| default: |
| throw new IllegalStateException( I18n.err( I18n.ERR_687, unit ) ); |
| } |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void checkNotClosed() throws CursorClosedException |
| { |
| if ( ( System.currentTimeMillis() > startTime + millisToLive ) && !closed ) |
| { |
| // state check needed to "try" not to overwrite exception (lack of |
| // synchronization may still allow overwriting but who cares that |
| // much |
| // not going to sync because who cares if it takes a little |
| // longer to stop but we need to set cause before toggling |
| // closed state or else check for closure can throw null cause |
| cause = new LdapTimeLimitExceededException(); |
| closed = true; |
| } |
| |
| if ( closed ) |
| { |
| throw new CursorClosedException( cause.getMessage(), cause ); |
| } |
| } |
| |
| |
| /* |
| * (non-Javadoc) |
| * @see org.apache.directory.server.core.cursor.ClosureMonitor#close() |
| */ |
| public void close() |
| { |
| if ( !closed ) |
| { |
| // not going to sync because who cares if it takes a little longer |
| // to stop but we need to set cause before toggling closed state |
| // or else check for closure can throw null cause |
| cause = new CursorClosedException(); |
| closed = true; |
| } |
| } |
| |
| |
| /* |
| * (non-Javadoc) |
| * @see org.apache.directory.server.core.cursor.ClosureMonitor#close(java.lang.String) |
| */ |
| public void close( String cause ) |
| { |
| if ( !closed ) |
| { |
| // not going to sync because who cares if it takes a little longer |
| // to stop but we need to set cause before toggling closed state |
| // or else check for closure can throw null cause |
| this.cause = new CursorClosedException( cause ); |
| closed = true; |
| } |
| } |
| |
| |
| /* |
| * (non-Javadoc) |
| * @see org.apache.directory.server.core.cursor.ClosureMonitor#close(java.lang.Exception) |
| */ |
| public void close( Exception cause ) |
| { |
| if ( !closed ) |
| { |
| // not going to sync because who cares if it takes a little longer |
| // to stop but we need to set cause before toggling closed state |
| // or else check for closure can throw null cause |
| this.cause = cause; |
| closed = true; |
| } |
| } |
| |
| |
| /* |
| * (non-Javadoc) |
| * @see org.apache.directory.server.core.cursor.ClosureMonitor#getCause() |
| */ |
| public Exception getCause() |
| { |
| return cause; |
| } |
| |
| |
| /* |
| * (non-Javadoc) |
| * @see org.apache.directory.server.core.cursor.ClosureMonitor#isClosed() |
| */ |
| public boolean isClosed() |
| { |
| if ( System.currentTimeMillis() > startTime + millisToLive ) |
| { |
| // set cause first always |
| cause = new LdapTimeLimitExceededException(); |
| closed = true; |
| } |
| |
| return closed; |
| } |
| } |