/**
* This file is part of Graylog2.
*
* Graylog2 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Graylog2 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Graylog2. If not, see <http://www.gnu.org/licenses/>.
*/
package org.graylog2.rest.resources.system;
import com.codahale.metrics.annotation.Timed;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import org.graylog2.cluster.Node;
import org.graylog2.cluster.NodeNotFoundException;
import org.graylog2.cluster.NodeService;
import org.graylog2.plugin.Tools;
import org.graylog2.plugin.system.NodeId;
import com.wordnik.swagger.annotations.*;
import org.graylog2.rest.resources.RestResource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.inject.Inject;
import javax.ws.rs.*;
import javax.ws.rs.core.MediaType;
import java.util.List;
import java.util.Map;
/**
* @author Lennart Koopmann <lennart@torch.sh>
*/
@Api(value = "System/Cluster", description = "Node discovery")
@Path("/system/cluster")
@Produces(MediaType.APPLICATION_JSON)
public class ClusterResource extends RestResource {
private static final Logger LOG = LoggerFactory.getLogger(ClusterResource.class);
private final NodeService nodeService;
private final NodeId nodeId;
@Inject
public ClusterResource(NodeService nodeService,
NodeId nodeId) {
this.nodeService = nodeService;
this.nodeId = nodeId;
}
@GET @Timed
@Path("/nodes")
@ApiOperation(value = "List all active nodes in this cluster.")
public String nodes() {
List<Map<String, Object>> nodeList = Lists.newArrayList();
Map<String, Node> nodes = nodeService.allActive(Node.Type.SERVER);
for(Map.Entry<String, Node> e : nodes.entrySet()) {
nodeList.add(nodeSummary(e.getValue()));
}
Map<String, Object> result = Maps.newHashMap();
result.put("total", nodes.size());
result.put("nodes", nodeList);
return json(result);
}
@GET @Timed
@Path("/node")
@ApiOperation(value = "Information about this node.",
notes = "This is returning information of this node in context to its state in the cluster. " +
"Use the system API of the node itself to get system information.")
public String node() {
try {
return json(nodeSummary(nodeService.byNodeId(nodeId)));
} catch (NodeNotFoundException e) {
// this exception should never happen, if it does we have made it worksn't.(tm)
throw new WebApplicationException(500);
}
}
@GET
@Timed
@Path("/nodes/{nodeId}")
@ApiOperation(value = "Information about a node.",
notes = "This is returning information of a node in context to its state in the cluster. " +
"Use the system API of the node itself to get system information.")
@ApiResponses(value = {
@ApiResponse(code = 404, message = "Node not found.")
})
public String node(@ApiParam(name = "nodeId", required = true) @PathParam("nodeId") String nodeId) {
if (nodeId == null || nodeId.isEmpty()) {
LOG.error("Missing nodeId. Returning HTTP 400.");
throw new WebApplicationException(400);
}
Node node = null;
try {
node = nodeService.byNodeId(nodeId);
} catch (NodeNotFoundException e) {
LOG.error("Node <{}> not found.", nodeId);
throw new WebApplicationException(404);
}
return json(nodeSummary(node));
}
private Map<String, Object> nodeSummary(Node node) {
Map<String, Object> m = Maps.newHashMap();
m.put("id", node.getNodeId());
m.put("type", node.getType().toString().toLowerCase());
m.put("is_master", node.isMaster());
m.put("transport_address", node.getTransportAddress());
m.put("last_seen", Tools.getISO8601String(node.getLastSeen()));
// Only meant to be used for representation. Not a real ID.
m.put("short_node_id", node.getShortNodeId());
return m;
}
}