/**
* Copyright 2016 Yahoo Inc.
*
* 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.yahoo.pulsar.websocket.admin;
import static com.yahoo.pulsar.common.util.Codec.decode;
import java.util.Collection;
import java.util.Map;
import javax.ws.rs.Encoded;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response.Status;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.yahoo.pulsar.common.naming.DestinationName;
import com.yahoo.pulsar.common.stats.Metrics;
import com.yahoo.pulsar.websocket.stats.ProxyTopicStat;
import com.yahoo.pulsar.websocket.stats.ProxyTopicStat.ConsumerStats;
import com.yahoo.pulsar.websocket.stats.ProxyTopicStat.ProducerStats;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiResponse;
import io.swagger.annotations.ApiResponses;
import jersey.repackaged.com.google.common.collect.Maps;
@Path("/proxy-stats")
@Api(value = "/proxy", description = "Stats for web-socket proxy", tags = "proxy-stats")
@Produces(MediaType.APPLICATION_JSON)
public class WebSocketProxyStats extends WebSocketWebResource {
private static final Logger LOG = LoggerFactory.getLogger(WebSocketProxyStats.class);
@GET
@Path("/metrics")
@ApiOperation(value = "Gets the metrics for Monitoring", notes = "Requested should be executed by Monitoring agent on each proxy to fetch the metrics", response = Metrics.class, responseContainer = "List")
@ApiResponses(value = { @ApiResponse(code = 403, message = "Don't have admin permission") })
public Collection<Metrics> getMetrics() throws Exception {
// Ensure super user access only
validateSuperUserAccess();
try {
return service().getProxyStats().getMetrics();
} catch (Exception e) {
LOG.error("[{}] Failed to generate metrics", clientAppId(), e);
throw new RestException(e);
}
}
@GET
@Path("/{property}/{cluster}/{namespace}/{destination}/stats")
@ApiOperation(value = "Get the stats for the topic.")
@ApiResponses(value = { @ApiResponse(code = 403, message = "Don't have admin permission"),
@ApiResponse(code = 404, message = "Topic does not exist") })
public ProxyTopicStat getStats(@PathParam("property") String property, @PathParam("cluster") String cluster,
@PathParam("namespace") String namespace, @PathParam("destination") @Encoded String destination) {
destination = decode(destination);
DestinationName dn = DestinationName.get("persistent", property, cluster, namespace, destination);
validateUserAccess(dn);
ProxyTopicStat stats = getStat(dn.toString());
if (stats == null) {
throw new RestException(Status.NOT_FOUND, "Topic does not exist");
}
return stats;
}
@GET
@Path("/stats")
@ApiOperation(value = "Get the stats for the topic.")
@ApiResponses(value = { @ApiResponse(code = 403, message = "Don't have admin permission") })
public Map<String, ProxyTopicStat> getProxyStats() {
validateSuperUserAccess();
return getStat();
}
public ProxyTopicStat getStat(String topicName) {
if (!service().getProducers().containsKey(topicName) && !service().getConsumers().containsKey(topicName)) {
LOG.warn("topic doesn't exist {}", topicName);
throw new RestException(Status.NOT_FOUND, "Topic does not exist");
}
ProxyTopicStat topicStat = new ProxyTopicStat();
service().getProducers().get(topicName).forEach(handler -> {
ProducerStats stat = new ProducerStats(handler);
topicStat.producerStats.add(stat);
});
service().getConsumers().get(topicName).forEach(handler -> {
topicStat.consumerStats.add(new ConsumerStats(handler));
});
return topicStat;
}
public Map<String, ProxyTopicStat> getStat() {
Map<String, ProxyTopicStat> statMap = Maps.newHashMap();
service().getProducers().forEach((topicName, handlers) -> {
ProxyTopicStat topicStat = statMap.computeIfAbsent(topicName, t -> new ProxyTopicStat());
handlers.forEach(handler -> topicStat.producerStats.add(new ProducerStats(handler)));
statMap.put(topicName, topicStat);
});
service().getConsumers().forEach((topicName, handlers) -> {
ProxyTopicStat topicStat = statMap.computeIfAbsent(topicName, t -> new ProxyTopicStat());
handlers.forEach(handler -> topicStat.consumerStats.add(new ConsumerStats(handler)));
statMap.put(topicName, topicStat);
});
return statMap;
}
}