| /* |
| * 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.openjpa.event; |
| |
| import java.net.InetAddress; |
| import java.net.UnknownHostException; |
| import java.security.AccessController; |
| import java.util.List; |
| import java.util.Timer; |
| import java.util.TimerTask; |
| import java.util.stream.Collectors; |
| import org.apache.openjpa.lib.util.J2DoPrivHelper; |
| |
| public abstract class DynamicTCPRemoteCommitProvider extends TCPRemoteCommitProvider { |
| |
| private int _cacheDurationMillis = 30000; |
| |
| public DynamicTCPRemoteCommitProvider() throws UnknownHostException { |
| super(); |
| } |
| |
| public int getCacheDurationMillis() { |
| return _cacheDurationMillis; |
| } |
| |
| public void setCacheDurationMillis(final int _cacheDurationMillis) { |
| this._cacheDurationMillis = _cacheDurationMillis; |
| } |
| |
| @Override |
| public final void setAddresses(final String names) throws UnknownHostException { |
| throw new UnknownHostException("Do not set Addresses on this instance; " |
| + "did you expect " + TCPRemoteCommitProvider.class.getSimpleName() + " ?"); |
| } |
| |
| @Override |
| public void endConfiguration() { |
| TcpAddressesUpdater updater = new TcpAddressesUpdater(); |
| updater.run(); |
| |
| Timer timer = new Timer(true); |
| timer.scheduleAtFixedRate(updater, 0, _cacheDurationMillis); |
| |
| super.endConfiguration(); |
| } |
| |
| protected abstract List<String> fetchDynamicAddresses(); |
| |
| private class TcpAddressesUpdater extends TimerTask { |
| |
| @Override |
| public void run() { |
| List<String> dynamicAddresses = fetchDynamicAddresses(); |
| |
| _addressesLock.lock(); |
| try { |
| String localhostAddress = InetAddress.getLocalHost().getHostAddress(); |
| |
| for (String dynamic : dynamicAddresses) { |
| InetAddress tmpAddress = AccessController.doPrivileged(J2DoPrivHelper.getByNameAction(dynamic)); |
| |
| if (localhostAddress.equals(dynamic)) { |
| // This string matches the hostname for for ourselves, we |
| // don't actually need to send ourselves messages. |
| if (log.isTraceEnabled()) { |
| log.trace(s_loc.get("tcp-address-asself", tmpAddress.getHostAddress() + ":" + _port)); |
| } |
| } else { |
| HostAddress podAddress = new HostAddress(dynamic); |
| if (_addresses.contains(podAddress)) { |
| if (log.isTraceEnabled()) { |
| log.trace(s_loc.get("dyntcp-address-not-set", |
| podAddress.getAddress().getHostAddress() + ":" + podAddress.getPort())); |
| } |
| } else { |
| _addresses.add(podAddress); |
| |
| if (log.isTraceEnabled()) { |
| log.trace(s_loc.get("dyntcp-address-set", |
| podAddress.getAddress().getHostAddress() + ":" + podAddress.getPort())); |
| } |
| } |
| } |
| } |
| |
| List<HostAddress> toCloseAndRemove = _addresses.stream(). |
| filter(address -> !dynamicAddresses.contains(address.getAddress().getHostAddress())). |
| collect(Collectors.toList()); |
| toCloseAndRemove.forEach(address -> { |
| address.close(); |
| _addresses.remove(address); |
| |
| if (log.isTraceEnabled()) { |
| log.trace(s_loc.get("tcp-address-unset", |
| address.getAddress().getHostAddress() + ":" + address.getPort())); |
| } |
| }); |
| } catch (Exception e) { |
| if (log.isErrorEnabled()) { |
| log.error(s_loc.get("dyntcp-updater-error"), e); |
| } |
| } finally { |
| _addressesLock.unlock(); |
| } |
| } |
| } |
| } |