Yuta HIGUCHI | 60731cb | 2014-11-11 01:34:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 16 | package org.onosproject.store.service.impl; |
Yuta HIGUCHI | 60731cb | 2014-11-11 01:34:46 -0800 | [diff] [blame] | 17 | |
| 18 | import static com.google.common.base.Preconditions.checkArgument; |
| 19 | import static com.google.common.base.Preconditions.checkNotNull; |
| 20 | import static org.slf4j.LoggerFactory.getLogger; |
| 21 | |
| 22 | import java.io.File; |
| 23 | import java.io.IOException; |
| 24 | import java.util.HashMap; |
| 25 | import java.util.HashSet; |
| 26 | import java.util.Iterator; |
| 27 | import java.util.Map; |
| 28 | import java.util.Map.Entry; |
| 29 | import java.util.Set; |
| 30 | |
Brian O'Connor | abafb50 | 2014-12-02 22:26:20 -0800 | [diff] [blame] | 31 | import org.onosproject.cluster.DefaultControllerNode; |
| 32 | import org.onosproject.cluster.NodeId; |
Yuta HIGUCHI | 60731cb | 2014-11-11 01:34:46 -0800 | [diff] [blame] | 33 | import org.onlab.packet.IpAddress; |
| 34 | import org.slf4j.Logger; |
| 35 | |
| 36 | import com.fasterxml.jackson.core.JsonEncoding; |
| 37 | import com.fasterxml.jackson.core.JsonFactory; |
| 38 | import com.fasterxml.jackson.databind.JsonNode; |
| 39 | import com.fasterxml.jackson.databind.ObjectMapper; |
| 40 | import com.fasterxml.jackson.databind.node.ArrayNode; |
| 41 | import com.fasterxml.jackson.databind.node.ObjectNode; |
| 42 | |
| 43 | /** |
| 44 | * Allows for reading and writing tablet definition as a JSON file. |
| 45 | */ |
| 46 | public class TabletDefinitionStore { |
| 47 | |
| 48 | private final Logger log = getLogger(getClass()); |
| 49 | |
| 50 | private final File file; |
| 51 | |
| 52 | /** |
| 53 | * Creates a reader/writer of the tablet definition file. |
| 54 | * |
| 55 | * @param filePath location of the definition file |
| 56 | */ |
| 57 | public TabletDefinitionStore(String filePath) { |
| 58 | file = new File(filePath); |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * Creates a reader/writer of the tablet definition file. |
| 63 | * |
| 64 | * @param filePath location of the definition file |
| 65 | */ |
| 66 | public TabletDefinitionStore(File filePath) { |
| 67 | file = checkNotNull(filePath); |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Returns the Map from tablet name to set of initial member nodes. |
| 72 | * |
| 73 | * @return Map from tablet name to set of initial member nodes |
| 74 | * @throws IOException when I/O exception of some sort has occurred. |
| 75 | */ |
| 76 | public Map<String, Set<DefaultControllerNode>> read() throws IOException { |
| 77 | |
| 78 | final Map<String, Set<DefaultControllerNode>> tablets = new HashMap<>(); |
| 79 | |
| 80 | final ObjectMapper mapper = new ObjectMapper(); |
| 81 | final ObjectNode tabletNodes = (ObjectNode) mapper.readTree(file); |
| 82 | final Iterator<Entry<String, JsonNode>> fields = tabletNodes.fields(); |
| 83 | while (fields.hasNext()) { |
| 84 | final Entry<String, JsonNode> next = fields.next(); |
| 85 | final Set<DefaultControllerNode> nodes = new HashSet<>(); |
| 86 | final Iterator<JsonNode> elements = next.getValue().elements(); |
| 87 | while (elements.hasNext()) { |
| 88 | ObjectNode nodeDef = (ObjectNode) elements.next(); |
| 89 | nodes.add(new DefaultControllerNode(new NodeId(nodeDef.get("id").asText()), |
| 90 | IpAddress.valueOf(nodeDef.get("ip").asText()), |
| 91 | nodeDef.get("tcpPort").asInt(9876))); |
| 92 | } |
| 93 | |
| 94 | tablets.put(next.getKey(), nodes); |
| 95 | } |
| 96 | return tablets; |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * Updates the Map from tablet name to set of member nodes. |
| 101 | * |
| 102 | * @param tabletName name of the tablet to update |
| 103 | * @param nodes set of initial member nodes |
| 104 | * @throws IOException when I/O exception of some sort has occurred. |
| 105 | */ |
| 106 | public void write(String tabletName, Set<DefaultControllerNode> nodes) throws IOException { |
| 107 | checkNotNull(tabletName); |
| 108 | checkArgument(tabletName.isEmpty(), "Tablet name cannot be empty"); |
| 109 | // TODO should validate if tabletName is allowed in JSON |
| 110 | |
| 111 | // load current |
| 112 | Map<String, Set<DefaultControllerNode>> config; |
| 113 | try { |
| 114 | config = read(); |
| 115 | } catch (IOException e) { |
| 116 | log.info("Reading tablet config failed, assuming empty definition."); |
| 117 | config = new HashMap<>(); |
| 118 | } |
| 119 | // update with specified |
| 120 | config.put(tabletName, nodes); |
| 121 | |
| 122 | // write back to file |
| 123 | final ObjectMapper mapper = new ObjectMapper(); |
| 124 | final ObjectNode tabletNodes = mapper.createObjectNode(); |
| 125 | for (Entry<String, Set<DefaultControllerNode>> tablet : config.entrySet()) { |
| 126 | ArrayNode nodeDefs = mapper.createArrayNode(); |
| 127 | tabletNodes.set(tablet.getKey(), nodeDefs); |
| 128 | |
| 129 | for (DefaultControllerNode node : tablet.getValue()) { |
| 130 | ObjectNode nodeDef = mapper.createObjectNode(); |
| 131 | nodeDef.put("id", node.id().toString()) |
| 132 | .put("ip", node.ip().toString()) |
| 133 | .put("tcpPort", node.tcpPort()); |
| 134 | nodeDefs.add(nodeDef); |
| 135 | } |
| 136 | } |
| 137 | mapper.writeTree(new JsonFactory().createGenerator(file, JsonEncoding.UTF8), |
| 138 | tabletNodes); |
| 139 | } |
| 140 | |
| 141 | } |