| package org.onosproject.store.consistent.impl; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.Set; |
| |
| import org.onosproject.cluster.DefaultControllerNode; |
| import org.onosproject.cluster.NodeId; |
| import org.onlab.packet.IpAddress; |
| import org.slf4j.Logger; |
| |
| 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 com.google.common.collect.Maps; |
| |
| /** |
| * Allows for reading and writing partitioned database definition as a JSON file. |
| */ |
| public class DatabaseDefinitionStore { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| private final File definitionfile; |
| |
| /** |
| * Creates a reader/writer of the database definition file. |
| * |
| * @param filePath location of the definition file |
| */ |
| public DatabaseDefinitionStore(String filePath) { |
| definitionfile = new File(filePath); |
| } |
| |
| /** |
| * Creates a reader/writer of the database definition file. |
| * |
| * @param filePath location of the definition file |
| */ |
| public DatabaseDefinitionStore(File filePath) { |
| definitionfile = checkNotNull(filePath); |
| } |
| |
| /** |
| * Returns the Map from database partition name to set of initial active member nodes. |
| * |
| * @return Map from partition name to set of active member nodes |
| * @throws IOException when I/O exception of some sort has occurred. |
| */ |
| public Map<String, Set<DefaultControllerNode>> read() throws IOException { |
| |
| final Map<String, Set<DefaultControllerNode>> partitions = Maps.newHashMap(); |
| |
| final ObjectMapper mapper = new ObjectMapper(); |
| final ObjectNode tabletNodes = (ObjectNode) mapper.readTree(definitionfile); |
| final Iterator<Entry<String, JsonNode>> fields = tabletNodes.fields(); |
| while (fields.hasNext()) { |
| final Entry<String, JsonNode> next = fields.next(); |
| final Set<DefaultControllerNode> nodes = new HashSet<>(); |
| final Iterator<JsonNode> elements = next.getValue().elements(); |
| while (elements.hasNext()) { |
| ObjectNode nodeDef = (ObjectNode) elements.next(); |
| nodes.add(new DefaultControllerNode(new NodeId(nodeDef.get("id").asText()), |
| IpAddress.valueOf(nodeDef.get("ip").asText()), |
| nodeDef.get("tcpPort").asInt(DatabaseManager.COPYCAT_TCP_PORT))); |
| } |
| |
| partitions.put(next.getKey(), nodes); |
| } |
| return partitions; |
| } |
| |
| /** |
| * Updates the Map from database partition name to set of member nodes. |
| * |
| * @param partitionName name of the database partition to update |
| * @param nodes set of initial member nodes |
| * @throws IOException when I/O exception of some sort has occurred. |
| */ |
| public void write(String partitionName, Set<DefaultControllerNode> nodes) throws IOException { |
| checkNotNull(partitionName); |
| checkArgument(partitionName.isEmpty(), "Partition name cannot be empty"); |
| |
| // load current |
| Map<String, Set<DefaultControllerNode>> config; |
| try { |
| config = read(); |
| } catch (IOException e) { |
| log.info("Reading partition config failed, assuming empty definition."); |
| config = new HashMap<>(); |
| } |
| // update with specified |
| config.put(partitionName, nodes); |
| |
| // write back to file |
| final ObjectMapper mapper = new ObjectMapper(); |
| final ObjectNode partitionNodes = mapper.createObjectNode(); |
| for (Entry<String, Set<DefaultControllerNode>> tablet : config.entrySet()) { |
| ArrayNode nodeDefs = mapper.createArrayNode(); |
| partitionNodes.set(tablet.getKey(), nodeDefs); |
| |
| for (DefaultControllerNode node : tablet.getValue()) { |
| 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(definitionfile, JsonEncoding.UTF8), |
| partitionNodes); |
| } |
| } |