| package org.onlab.onos.store.cluster.impl; |
| |
| import com.fasterxml.jackson.core.JsonEncoding; |
| import com.fasterxml.jackson.core.JsonFactory; |
| import com.fasterxml.jackson.databind.JsonNode; |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.fasterxml.jackson.databind.node.ArrayNode; |
| import com.fasterxml.jackson.databind.node.ObjectNode; |
| import org.onlab.onos.cluster.DefaultControllerNode; |
| import org.onlab.onos.cluster.NodeId; |
| import org.onlab.packet.IpPrefix; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Set; |
| |
| /** |
| * Allows for reading and writing cluster definition as a JSON file. |
| */ |
| public class ClusterDefinitionStore { |
| |
| private final File file; |
| |
| /** |
| * Creates a reader/writer of the cluster definition file. |
| * |
| * @param filePath location of the definition file |
| */ |
| public ClusterDefinitionStore(String filePath) { |
| file = new File(filePath); |
| } |
| |
| /** |
| * Returns set of the controller nodes, including self. |
| * |
| * @return set of controller nodes |
| */ |
| public Set<DefaultControllerNode> read() throws IOException { |
| Set<DefaultControllerNode> nodes = new HashSet<>(); |
| ObjectMapper mapper = new ObjectMapper(); |
| ObjectNode clusterNodeDef = (ObjectNode) mapper.readTree(file); |
| Iterator<JsonNode> it = ((ArrayNode) clusterNodeDef.get("nodes")).elements(); |
| while (it.hasNext()) { |
| ObjectNode nodeDef = (ObjectNode) it.next(); |
| nodes.add(new DefaultControllerNode(new NodeId(nodeDef.get("id").asText()), |
| IpPrefix.valueOf(nodeDef.get("ip").asText()), |
| nodeDef.get("tcpPort").asInt(9876))); |
| } |
| return nodes; |
| } |
| |
| /** |
| * Writes the given set of the controller nodes. |
| * |
| * @param nodes set of controller nodes |
| */ |
| public void write(Set<DefaultControllerNode> nodes) throws IOException { |
| ObjectMapper mapper = new ObjectMapper(); |
| ObjectNode clusterNodeDef = mapper.createObjectNode(); |
| ArrayNode nodeDefs = mapper.createArrayNode(); |
| clusterNodeDef.set("nodes", nodeDefs); |
| for (DefaultControllerNode node : nodes) { |
| ObjectNode nodeDef = mapper.createObjectNode(); |
| nodeDef.put("id", node.id().toString()) |
| .put("ip", node.ip().toString()) |
| .put("tcpPort", node.tcpPort()); |
| nodeDefs.add(nodeDef); |
| } |
| mapper.writeTree(new JsonFactory().createGenerator(file, JsonEncoding.UTF8), |
| clusterNodeDef); |
| } |
| |
| } |