com.hazelcast.client.spi.impl.discovery.DiscoveryAddressTranslator Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2020, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.client.spi.impl.discovery;
import com.hazelcast.client.connection.AddressTranslator;
import com.hazelcast.nio.Address;
import com.hazelcast.spi.discovery.DiscoveryNode;
import com.hazelcast.spi.discovery.integration.DiscoveryService;
import java.util.HashMap;
import java.util.Map;
import static com.hazelcast.util.Preconditions.checkNotNull;
public class DiscoveryAddressTranslator
implements AddressTranslator {
private final DiscoveryService discoveryService;
private final boolean usePublic;
private volatile Map privateToPublic;
public DiscoveryAddressTranslator(DiscoveryService discoveryService, boolean usePublic) {
this.discoveryService = discoveryService;
this.usePublic = usePublic;
}
@Override
public Address translate(Address address) {
if (address == null) {
return null;
}
// if it is inside cloud, return private address otherwise we need to translate it.
if (!usePublic) {
return address;
}
// Refresh only once to prevent load on service discovery
boolean alreadyRefreshed = false;
Map privateToPublic = this.privateToPublic;
if (privateToPublic == null) {
refresh();
alreadyRefreshed = true;
}
privateToPublic = this.privateToPublic;
Address publicAddress = privateToPublic.get(address);
if (publicAddress == null && !alreadyRefreshed) {
refresh();
privateToPublic = this.privateToPublic;
publicAddress = privateToPublic.get(address);
}
// If public address available return, otherwise choose given address
return publicAddress != null ? publicAddress : address;
}
@Override
public void refresh() {
Iterable discoveredNodes = checkNotNull(discoveryService.discoverNodes(),
"Discovered nodes cannot be null!");
Map privateToPublic = new HashMap();
for (DiscoveryNode discoveryNode : discoveredNodes) {
privateToPublic.put(discoveryNode.getPrivateAddress(), discoveryNode.getPublicAddress());
}
this.privateToPublic = privateToPublic;
}
}