/**
* Copyright (C) 2014 Couchbase, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALING
* IN THE SOFTWARE.
*/
package com.couchbase.client.core.config.refresher;
import com.couchbase.client.core.ClusterFacade;
import com.couchbase.client.core.config.BucketConfig;
import com.couchbase.client.core.config.ClusterConfig;
import com.couchbase.client.core.env.CoreEnvironment;
import com.couchbase.client.core.logging.CouchbaseLogger;
import com.couchbase.client.core.logging.CouchbaseLoggerFactory;
import com.couchbase.client.core.message.kv.GetBucketConfigRequest;
import com.couchbase.client.core.message.kv.GetBucketConfigResponse;
import io.netty.util.CharsetUtil;
import rx.Observable;
import rx.Subscriber;
import rx.Subscription;
import rx.functions.Action0;
import rx.functions.Action1;
import rx.functions.Func1;
import java.net.InetAddress;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.TimeUnit;
/**
* Keeps the bucket config fresh through carrier configuration management.
*
* @author Michael Nitschinger
* @since 1.0
*/
public class CarrierRefresher extends AbstractRefresher {
/**
* The logger used.
*/
private static final CouchbaseLogger LOGGER = CouchbaseLoggerFactory.getInstance(CarrierRefresher.class);
private final Map<String, Subscription> subscriptions;
private final CoreEnvironment environment;
public CarrierRefresher(final CoreEnvironment environment, final ClusterFacade cluster) {
super(cluster);
subscriptions = new ConcurrentHashMap<String, Subscription>();
this.environment = environment;
}
@Override
public Observable<Boolean> shutdown() {
return Observable.just(true);
}
@Override
public void markTainted(final BucketConfig config) {
if (subscriptions.containsKey(config.name())) {
return;
}
LOGGER.debug("Config for bucket \"" + config.name() + "\" marked as tainted, starting polling.");
Observable.create(new Observable.OnSubscribe<Object>() {
@Override
public void call(final Subscriber<? super Object> subscriber) {
Subscription subscription = environment.scheduler().createWorker().schedulePeriodically(new Action0() {
@Override
public void call() {
final InetAddress hostname = config.nodes().get(0).hostname();
cluster()
.<GetBucketConfigResponse>send(new GetBucketConfigRequest(config.name(), hostname))
.subscribe(new Action1<GetBucketConfigResponse>() {
@Override
public void call(GetBucketConfigResponse res) {
String rawConfig = res.content().toString(CharsetUtil.UTF_8).replace("$HOST",
hostname.getHostName());
provider().proposeBucketConfig(res.bucket(), rawConfig);
}
});
}
}, 0, 1, TimeUnit.SECONDS);
subscriptions.put(config.name(), subscription);
}
}).subscribe();
}
@Override
public void markUntainted(final BucketConfig config) {
Subscription subscription = subscriptions.get(config.name());
if (subscription != null) {
LOGGER.debug("Config for bucket \"" + config.name() + "\" marked as untainted, stopping polling.");
subscription.unsubscribe();
subscriptions.remove(config.name());
}
}
@Override
public void refresh(final ClusterConfig config) {
Observable
.from(config.bucketConfigs().values())
.filter(new Func1<BucketConfig, Boolean>() {
@Override
public Boolean call(BucketConfig config) {
return registrations().containsKey(config.name());
}
})
.subscribe(new Action1<BucketConfig>() {
@Override
public void call(final BucketConfig config) {
InetAddress hostname = config.nodes().get(0).hostname();
cluster()
.<GetBucketConfigResponse>send(new GetBucketConfigRequest(config.name(), hostname))
.map(new Func1<GetBucketConfigResponse, String>() {
@Override
public String call(GetBucketConfigResponse response) {
String raw = response.content().toString(CharsetUtil.UTF_8);
return raw.replace("$HOST", response.hostname().getHostName());
}
}).subscribe(new Action1<String>() {
@Override
public void call(String rawConfig) {
provider().proposeBucketConfig(config.name(), rawConfig);
}
});
}
});
}
}