| /* |
| * 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.felix.webconsole.plugins.event.internal; |
| |
| import java.util.ArrayList; |
| import java.util.Dictionary; |
| import java.util.List; |
| |
| /** |
| * This class collects events |
| */ |
| public class EventCollector |
| { |
| |
| private static final String PROPERTY_MAX_SIZE = "max.size"; |
| private static final int DEFAULT_MAX_SIZE = 250; |
| |
| private List<EventInfo> eventInfos; |
| |
| private long startTime; |
| |
| private int maxSize; |
| |
| public EventCollector() |
| { |
| this.clear(); |
| this.updateConfiguration(null); |
| } |
| |
| public void add(final EventInfo info) |
| { |
| if ( info != null ) |
| { |
| synchronized ( this ) |
| { |
| this.eventInfos.add( info ); |
| if ( eventInfos.size() > this.maxSize ) |
| { |
| eventInfos.remove( 0 ); |
| } |
| if ( this.eventInfos.size() == 1 ) |
| { |
| this.startTime = info.received; |
| } |
| } |
| } |
| } |
| |
| public void clear() |
| { |
| synchronized ( this ) |
| { |
| this.eventInfos = new ArrayList<>(); |
| this.startTime = System.currentTimeMillis(); |
| } |
| } |
| |
| /** |
| * Return a copy of the current event list |
| */ |
| public List<EventInfo> getEvents() |
| { |
| synchronized ( this ) |
| { |
| return new ArrayList<>(eventInfos); |
| } |
| } |
| |
| public void updateConfiguration( final Dictionary<String, ?> props) |
| { |
| this.maxSize = OsgiUtil.toInteger(props, PROPERTY_MAX_SIZE, DEFAULT_MAX_SIZE); |
| synchronized ( this ) |
| { |
| while ( eventInfos.size() > this.maxSize ) |
| { |
| eventInfos.remove( 0 ); |
| } |
| |
| } |
| } |
| |
| public long getStartTime() |
| { |
| return this.startTime; |
| } |
| } |