@Test
public void testSyncSetWithVersion() {
String className = TestHelper.getTestClassName();
String methodName = TestHelper.getTestMethodName();
String testName = className + "_" + methodName;
System.out.println("START " + testName + " at " + new Date(System.currentTimeMillis()));
String path = String.format("/%s/%s", testName, "msg_0");
ZNRecord record = new ZNRecord("msg_0");
BaseDataAccessor<ZNRecord> accessor = new ZkBaseDataAccessor<ZNRecord>(_gZkClient);
// set persistent
boolean success = accessor.set(path, record, 0, AccessOption.PERSISTENT);
Assert.assertFalse(success, "Should fail since version not match");
try {
_gZkClient.readData(path, false);
Assert.fail("Should get no node exception");
} catch (Exception e) {
// OK
}
success = accessor.set(path, record, -1, AccessOption.PERSISTENT);
Assert.assertTrue(success);
ZNRecord getRecord = _gZkClient.readData(path);
Assert.assertNotNull(getRecord);
Assert.assertEquals(getRecord.getId(), "msg_0");
// set ephemeral
path = String.format("/%s/%s", testName, "msg_1");
record = new ZNRecord("msg_1");
success = accessor.set(path, record, 0, AccessOption.EPHEMERAL);
Assert.assertFalse(success);
try {
_gZkClient.readData(path, false);
Assert.fail("Should get no node exception");
} catch (Exception e) {
// OK
}
success = accessor.set(path, record, -1, AccessOption.EPHEMERAL);
Assert.assertTrue(success);
getRecord = _gZkClient.readData(path);
Assert.assertNotNull(getRecord);
Assert.assertEquals(getRecord.getId(), "msg_1");
record.setSimpleField("key0", "value0");
success = accessor.set(path, record, 0, AccessOption.PERSISTENT);
Assert.assertTrue(success, "Should pass. AccessOption.PERSISTENT is ignored");
getRecord = _gZkClient.readData(path);
Assert.assertNotNull(getRecord);
Assert.assertEquals(getRecord.getSimpleFields().size(), 1);
Assert.assertNotNull(getRecord.getSimpleField("key0"));
Assert.assertEquals(getRecord.getSimpleField("key0"), "value0");
System.out.println("END " + testName + " at " + new Date(System.currentTimeMillis()));
}
@Test
public void testSyncRemove() {
String className = TestHelper.getTestClassName();
String methodName = TestHelper.getTestMethodName();
String testName = className + "_" + methodName;
System.out.println("START " + testName + " at " + new Date(System.currentTimeMillis()));
String path = String.format("/%s/%s", testName, "msg_0");
ZNRecord record = new ZNRecord("msg_0");
ZkBaseDataAccessor<ZNRecord> accessor = new ZkBaseDataAccessor<ZNRecord>(_gZkClient);
boolean success = accessor.remove(path, 0);
Assert.assertFalse(success);
success = accessor.create(path, record, AccessOption.PERSISTENT);
Assert.assertTrue(success);
ZNRecord getRecord = _gZkClient.readData(path);
Assert.assertNotNull(getRecord);
Assert.assertEquals(getRecord.getId(), "msg_0");
success = accessor.remove(path, 0);
Assert.assertTrue(success);
Assert.assertFalse(_gZkClient.exists(path));
System.out.println("END " + testName + " at " + new Date(System.currentTimeMillis()));
}
@Test
public void testSyncDoSet() {
String className = TestHelper.getTestClassName();
String methodName = TestHelper.getTestMethodName();
String testName = className + "_" + methodName;
System.out.println("START " + testName + " at " + new Date(System.currentTimeMillis()));
String path = String.format("/%s/%s/%s", testName, "msg_0", "submsg_0");
ZNRecord record = new ZNRecord("submsg_0");
ZkBaseDataAccessor<ZNRecord> accessor = new ZkBaseDataAccessor<ZNRecord>(_gZkClient);
AccessResult result = accessor.doSet(path, record, -1, AccessOption.PERSISTENT);
Assert.assertEquals(result._retCode, RetCode.OK);
Assert.assertEquals(result._pathCreated.size(), 3);
Assert.assertTrue(result._pathCreated.contains(String.format("/%s", testName)));
Assert.assertTrue(result._pathCreated.contains(String.format("/%s/%s", testName, "msg_0")));
Assert.assertTrue(result._pathCreated.contains(path));
Assert.assertTrue(_gZkClient.exists(String.format("/%s", testName)));
Assert.assertTrue(_gZkClient.exists(String.format("/%s/%s", testName, "msg_0")));
ZNRecord getRecord = _gZkClient.readData(path);
Assert.assertNotNull(getRecord);
Assert.assertEquals(getRecord.getId(), "submsg_0");
System.out.println("END " + testName + " at " + new Date(System.currentTimeMillis()));
}
/*
* The parameter is a map that maps the nodeName to a list of ZNRecords.
*/
public List<ZNRecord> computeExternalView(
Map<String, List<ZNRecord>> currentStates, List<ZNRecord> idealStates) {
List<ZNRecord> resultList = new ArrayList<ZNRecord>();
Map<String, ZNRecord> resultRoutingTable = new HashMap<String, ZNRecord>();
// maps from resourceName to another map : partition -> map <nodename,
// master/slave>;
// Fill the routing table with "empty" default state according to ideals
// states
// in the cluster
if (idealStates != null) {
for (ZNRecord idealState : idealStates) {
ZNRecord defaultExternalView = new ZNRecord(idealState.getId());
resultRoutingTable.put(idealState.getId(), defaultExternalView);
}
} else {
assert (!currentStates.isEmpty());
return resultList;
}
for (String nodeName : currentStates.keySet()) {
List<ZNRecord> znStates = currentStates.get(nodeName);
for (ZNRecord nodeStateRecord : znStates) {
Map<String, Map<String, String>> resourceStates = nodeStateRecord.getMapFields();
for (String stateUnitKey : resourceStates.keySet()) {
Map<String, String> partitionStates = resourceStates.get(stateUnitKey);
String resourceName = partitionStates.get(Message.Attributes.RESOURCE_NAME.toString());
ZNRecord partitionStatus = resultRoutingTable.get(resourceName);
if (partitionStatus == null) {
partitionStatus = new ZNRecord(resourceName);
resultRoutingTable.put(resourceName, partitionStatus);
}
String currentStateKey = CurrentStateProperty.CURRENT_STATE.toString();
if (!partitionStatus.getMapFields().containsKey(stateUnitKey)) {
partitionStatus.setMapField(stateUnitKey, new TreeMap<String, String>());
}
partitionStatus
.getMapField(stateUnitKey)
.put(nodeName, partitionStates.get(currentStateKey));
}
}
}
for (ZNRecord record : resultRoutingTable.values()) {
resultList.add(record);
}
return resultList;
}
@Test
public void testSyncGet() {
String className = TestHelper.getTestClassName();
String methodName = TestHelper.getTestMethodName();
String testName = className + "_" + methodName;
System.out.println("START " + testName + " at " + new Date(System.currentTimeMillis()));
String path = String.format("/%s/%s", testName, "msg_0");
ZNRecord record = new ZNRecord("msg_0");
ZkBaseDataAccessor<ZNRecord> accessor = new ZkBaseDataAccessor<ZNRecord>(_gZkClient);
Stat stat = new Stat();
ZNRecord getRecord = accessor.get(path, stat, 0);
Assert.assertNull(getRecord);
try {
accessor.get(path, stat, AccessOption.THROW_EXCEPTION_IFNOTEXIST);
Assert.fail("Should throw exception if not exist");
} catch (Exception e) {
// OK
}
boolean success = accessor.create(path, record, AccessOption.PERSISTENT);
Assert.assertTrue(success);
getRecord = accessor.get(path, stat, 0);
Assert.assertNotNull(getRecord);
Assert.assertEquals(getRecord.getId(), "msg_0");
Assert.assertEquals(stat.getVersion(), 0);
record.setSimpleField("key0", "value0");
success = accessor.set(path, record, AccessOption.PERSISTENT);
Assert.assertTrue(success);
getRecord = accessor.get(path, stat, 0);
Assert.assertNotNull(getRecord);
Assert.assertEquals(record.getSimpleFields().size(), 1);
Assert.assertNotNull(getRecord.getSimpleField("key0"));
Assert.assertEquals(getRecord.getSimpleField("key0"), "value0");
Assert.assertEquals(stat.getVersion(), 1);
ZNRecord newRecord = new ZNRecord("msg_0");
newRecord.setSimpleField("key1", "value1");
success = accessor.update(path, new ZNRecordUpdater(newRecord), AccessOption.PERSISTENT);
Assert.assertTrue(success);
getRecord = accessor.get(path, stat, 0);
Assert.assertNotNull(getRecord);
Assert.assertEquals(getRecord.getSimpleFields().size(), 2);
Assert.assertNotNull(getRecord.getSimpleField("key0"));
Assert.assertEquals(getRecord.getSimpleField("key0"), "value0");
Assert.assertNotNull(getRecord.getSimpleField("key1"));
Assert.assertEquals(getRecord.getSimpleField("key1"), "value1");
Assert.assertEquals(stat.getVersion(), 2);
System.out.println("END " + testName + " at " + new Date(System.currentTimeMillis()));
}
@Test
public void testSyncUpdate() {
String className = TestHelper.getTestClassName();
String methodName = TestHelper.getTestMethodName();
String testName = className + "_" + methodName;
System.out.println("START " + testName + " at " + new Date(System.currentTimeMillis()));
String path = String.format("/%s/%s", testName, "msg_0");
ZNRecord record = new ZNRecord("msg_0");
ZkBaseDataAccessor<ZNRecord> accessor = new ZkBaseDataAccessor<ZNRecord>(_gZkClient);
boolean success = accessor.update(path, new ZNRecordUpdater(record), AccessOption.PERSISTENT);
Assert.assertTrue(success);
ZNRecord getRecord = _gZkClient.readData(path);
Assert.assertNotNull(getRecord);
Assert.assertEquals(getRecord.getId(), "msg_0");
record.setSimpleField("key0", "value0");
success = accessor.update(path, new ZNRecordUpdater(record), AccessOption.PERSISTENT);
Assert.assertTrue(success);
getRecord = _gZkClient.readData(path);
Assert.assertNotNull(getRecord);
Assert.assertEquals(getRecord.getSimpleFields().size(), 1);
Assert.assertNotNull(getRecord.getSimpleField("key0"));
Assert.assertEquals(getRecord.getSimpleField("key0"), "value0");
// test throw exception from updater
success =
accessor.update(
path,
new DataUpdater<ZNRecord>() {
@Override
public ZNRecord update(ZNRecord currentData) {
throw new RuntimeException("IGNORABLE: test throw exception from updater");
}
},
AccessOption.PERSISTENT);
Assert.assertFalse(success);
getRecord = _gZkClient.readData(path);
Assert.assertNotNull(getRecord);
Assert.assertEquals(getRecord.getSimpleFields().size(), 1);
System.out.println("END " + testName + " at " + new Date(System.currentTimeMillis()));
}
@Test
public void testAsyncZkBaseDataAccessor() {
System.out.println(
"START TestZkBaseDataAccessor.async at " + new Date(System.currentTimeMillis()));
String root = "TestZkBaseDataAccessor_asyn";
ZkClient zkClient = new ZkClient(ZK_ADDR);
zkClient.setZkSerializer(new ZNRecordSerializer());
zkClient.deleteRecursive("/" + root);
ZkBaseDataAccessor<ZNRecord> accessor = new ZkBaseDataAccessor<ZNRecord>(zkClient);
// test async createChildren
String parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
List<ZNRecord> records = new ArrayList<ZNRecord>();
List<String> paths = new ArrayList<String>();
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
paths.add(PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId));
records.add(new ZNRecord(msgId));
}
boolean[] success = accessor.createChildren(paths, records, AccessOption.PERSISTENT);
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
Assert.assertTrue(success[i], "Should succeed in create " + msgId);
}
// test get what we created
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId);
ZNRecord record = zkClient.readData(path);
Assert.assertEquals(record.getId(), msgId, "Should get what we created");
}
// test async setChildren
parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
records = new ArrayList<ZNRecord>();
paths = new ArrayList<String>();
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
paths.add(PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId));
ZNRecord newRecord = new ZNRecord(msgId);
newRecord.setSimpleField("key1", "value1");
records.add(newRecord);
}
success = accessor.setChildren(paths, records, AccessOption.PERSISTENT);
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
Assert.assertTrue(success[i], "Should succeed in set " + msgId);
}
// test get what we set
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId);
ZNRecord record = zkClient.readData(path);
Assert.assertEquals(record.getSimpleFields().size(), 1, "Should have 1 simple field set");
Assert.assertEquals(record.getSimpleField("key1"), "value1", "Should have value1 set");
}
// test async updateChildren
parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
// records = new ArrayList<ZNRecord>();
List<DataUpdater<ZNRecord>> znrecordUpdaters = new ArrayList<DataUpdater<ZNRecord>>();
paths = new ArrayList<String>();
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
paths.add(PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId));
ZNRecord newRecord = new ZNRecord(msgId);
newRecord.setSimpleField("key2", "value2");
// records.add(newRecord);
znrecordUpdaters.add(new ZNRecordUpdater(newRecord));
}
success = accessor.updateChildren(paths, znrecordUpdaters, AccessOption.PERSISTENT);
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
Assert.assertTrue(success[i], "Should succeed in update " + msgId);
}
// test get what we updated
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId);
ZNRecord record = zkClient.readData(path);
Assert.assertEquals(record.getSimpleFields().size(), 2, "Should have 2 simple fields set");
Assert.assertEquals(record.getSimpleField("key2"), "value2", "Should have value2 set");
}
// test async getChildren
parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
records = accessor.getChildren(parentPath, null, 0);
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
ZNRecord record = records.get(i);
Assert.assertEquals(record.getId(), msgId, "Should get what we updated");
Assert.assertEquals(record.getSimpleFields().size(), 2, "Should have 2 simple fields set");
Assert.assertEquals(record.getSimpleField("key2"), "value2", "Should have value2 set");
}
// test async exists
parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
paths = new ArrayList<String>();
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
paths.add(PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId));
}
boolean[] exists = accessor.exists(paths, 0);
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
Assert.assertTrue(exists[i], "Should exist " + msgId);
}
// test async getStats
parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
paths = new ArrayList<String>();
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
paths.add(PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId));
}
Stat[] stats = accessor.getStats(paths, 0);
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
Assert.assertNotNull(stats[i], "Stat should exist for " + msgId);
Assert.assertEquals(
stats[i].getVersion(),
2,
"DataVersion should be 2, since we set 1 and update 1 for " + msgId);
}
// test async remove
parentPath = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1");
paths = new ArrayList<String>();
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
paths.add(PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId));
}
success = accessor.remove(paths, 0);
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
Assert.assertTrue(success[i], "Should succeed in remove " + msgId);
}
// test get what we removed
for (int i = 0; i < 10; i++) {
String msgId = "msg_" + i;
String path = PropertyPathConfig.getPath(PropertyType.MESSAGES, root, "host_1", msgId);
boolean pathExists = zkClient.exists(path);
Assert.assertFalse(pathExists, "Should be removed " + msgId);
}
zkClient.close();
System.out.println(
"END TestZkBaseDataAccessor.async at " + new Date(System.currentTimeMillis()));
}