/**
* Create the completion node for the snapshot identified by the txnId. It assumes that all hosts
* will race to call this, so it doesn't fail if the node already exists.
*
* @param nonce Nonce of the snapshot
* @param txnId
* @param hostId The local host ID
* @param isTruncation Whether or not this is a truncation snapshot
* @param truncReqId Optional unique ID fed back to the monitor for identification
* @return true if the node is created successfully, false if the node already exists.
*/
public static ZKUtil.StringCallback createSnapshotCompletionNode(
String path, String nonce, long txnId, boolean isTruncation, String truncReqId) {
if (!(txnId > 0)) {
VoltDB.crashGlobalVoltDB("Txnid must be greather than 0", true, null);
}
byte nodeBytes[] = null;
try {
JSONStringer stringer = new JSONStringer();
stringer.object();
stringer.key("txnId").value(txnId);
stringer.key("isTruncation").value(isTruncation);
stringer.key("didSucceed").value(false);
stringer.key("hostCount").value(-1);
stringer.key("path").value(path);
stringer.key("nonce").value(nonce);
stringer.key("truncReqId").value(truncReqId);
stringer.key("exportSequenceNumbers").object().endObject();
stringer.endObject();
JSONObject jsonObj = new JSONObject(stringer.toString());
nodeBytes = jsonObj.toString(4).getBytes(Charsets.UTF_8);
} catch (Exception e) {
VoltDB.crashLocalVoltDB("Error serializing snapshot completion node JSON", true, e);
}
ZKUtil.StringCallback cb = new ZKUtil.StringCallback();
final String snapshotPath = VoltZK.completed_snapshots + "/" + txnId;
VoltDB.instance()
.getHostMessenger()
.getZK()
.create(snapshotPath, nodeBytes, Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT, cb, null);
return cb;
}
public MockVoltDB(int clientPort, int adminPort, int httpPort, int drPort) {
try {
JSONObject obj = new JSONObject();
JSONArray jsonArray = new JSONArray();
jsonArray.put("127.0.0.1");
obj.put("interfaces", jsonArray);
obj.put("clientPort", clientPort);
obj.put("adminPort", adminPort);
obj.put("httpPort", httpPort);
obj.put("drPort", drPort);
m_localMetadata = obj.toString(4);
m_catalog = new Catalog();
m_catalog.execute("add / clusters " + m_clusterName);
m_catalog.execute(
"add "
+ m_catalog.getClusters().get(m_clusterName).getPath()
+ " databases "
+ m_databaseName);
Cluster cluster = m_catalog.getClusters().get(m_clusterName);
// Set a sane default for TestMessaging (at least)
cluster.setHeartbeattimeout(10000);
assert (cluster != null);
try {
m_hostMessenger.start();
} catch (Exception e) {
throw new RuntimeException(e);
}
VoltZK.createPersistentZKNodes(m_hostMessenger.getZK());
m_hostMessenger
.getZK()
.create(
VoltZK.cluster_metadata + "/" + m_hostMessenger.getHostId(),
getLocalMetadata().getBytes("UTF-8"),
Ids.OPEN_ACL_UNSAFE,
CreateMode.EPHEMERAL);
m_hostMessenger.generateMailboxId(
m_hostMessenger.getHSIdForLocalSite(HostMessenger.STATS_SITE_ID));
m_statsAgent = new StatsAgent();
m_statsAgent.registerMailbox(
m_hostMessenger, m_hostMessenger.getHSIdForLocalSite(HostMessenger.STATS_SITE_ID));
for (MailboxType type : MailboxType.values()) {
m_mailboxMap.put(type, new LinkedList<MailboxNodeContent>());
}
m_mailboxMap
.get(MailboxType.StatsAgent)
.add(
new MailboxNodeContent(
m_hostMessenger.getHSIdForLocalSite(HostMessenger.STATS_SITE_ID), null));
m_siteTracker = new SiteTracker(m_hostId, m_mailboxMap);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private void writeKnownLiveNodes(List<Integer> liveNodes) {
try {
if (m_zk.exists(VoltZK.lastKnownLiveNodes, null) == null) {
// VoltZK.createPersistentZKNodes should have done this
m_zk.create(VoltZK.lastKnownLiveNodes, null, Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
}
JSONStringer stringer = new JSONStringer();
stringer.object();
stringer.key("liveNodes").array();
for (Integer node : liveNodes) {
stringer.value(node);
}
stringer.endArray();
stringer.endObject();
JSONObject obj = new JSONObject(stringer.toString());
tmLog.debug("Writing live nodes to ZK: " + obj.toString(4));
m_zk.setData(VoltZK.lastKnownLiveNodes, obj.toString(4).getBytes("UTF-8"), -1);
} catch (Exception e) {
VoltDB.crashLocalVoltDB(
"Unable to update known live nodes at ZK path: " + VoltZK.lastKnownLiveNodes, true, e);
}
}
/**
* Once participating host count is set, SnapshotCompletionMonitor can check this ZK node to
* determine whether the snapshot has finished or not.
*
* <p>This should only be called when all participants have responded. It is possible that some
* hosts finish taking snapshot before the coordinator logs the participating host count. In this
* case, the host count would have been decremented multiple times already. To make sure finished
* hosts are logged correctly, this method adds participating host count + 1 to the current host
* count.
*
* @param txnId The snapshot txnId
* @param participantCount The number of hosts participating in this snapshot
*/
public static void logParticipatingHostCount(long txnId, int participantCount) {
ZooKeeper zk = VoltDB.instance().getHostMessenger().getZK();
final String snapshotPath = VoltZK.completed_snapshots + "/" + txnId;
boolean success = false;
while (!success) {
Stat stat = new Stat();
byte data[] = null;
try {
data = zk.getData(snapshotPath, false, stat);
} catch (KeeperException e) {
if (e.code() == KeeperException.Code.NONODE) {
// If snapshot creation failed for some reason, the node won't exist. ignore
return;
}
VoltDB.crashLocalVoltDB("Failed to get snapshot completion node", true, e);
} catch (InterruptedException e) {
VoltDB.crashLocalVoltDB("Interrupted getting snapshot completion node", true, e);
}
if (data == null) {
VoltDB.crashLocalVoltDB("Data should not be null if the node exists", false, null);
}
try {
JSONObject jsonObj = new JSONObject(new String(data, Charsets.UTF_8));
if (jsonObj.getLong("txnId") != txnId) {
VoltDB.crashLocalVoltDB("TxnId should match", false, null);
}
int hostCount = jsonObj.getInt("hostCount");
// +1 because hostCount was initialized to -1
jsonObj.put("hostCount", hostCount + participantCount + 1);
zk.setData(snapshotPath, jsonObj.toString(4).getBytes(Charsets.UTF_8), stat.getVersion());
} catch (KeeperException.BadVersionException e) {
continue;
} catch (Exception e) {
VoltDB.crashLocalVoltDB("This ZK call should never fail", true, e);
}
success = true;
}
}
public DefaultSnapshotDataTarget(
final File file,
final int hostId,
final String clusterName,
final String databaseName,
final String tableName,
final int numPartitions,
final boolean isReplicated,
final List<Integer> partitionIds,
final VoltTable schemaTable,
final long txnId,
final long timestamp,
int version[])
throws IOException {
String hostname = CoreUtils.getHostnameOrAddress();
m_file = file;
m_tableName = tableName;
m_fos = new FileOutputStream(file);
m_channel = m_fos.getChannel();
m_needsFinalClose = !isReplicated;
final FastSerializer fs = new FastSerializer();
fs.writeInt(0); // CRC
fs.writeInt(0); // Header length placeholder
fs.writeByte(
1); // Indicate the snapshot was not completed, set to true for the CRC calculation, false
// later
for (int ii = 0; ii < 4; ii++) {
fs.writeInt(version[ii]); // version
}
JSONStringer stringer = new JSONStringer();
byte jsonBytes[] = null;
try {
stringer.object();
stringer.key("txnId").value(txnId);
stringer.key("hostId").value(hostId);
stringer.key("hostname").value(hostname);
stringer.key("clusterName").value(clusterName);
stringer.key("databaseName").value(databaseName);
stringer.key("tableName").value(tableName.toUpperCase());
stringer.key("isReplicated").value(isReplicated);
stringer.key("isCompressed").value(true);
stringer.key("checksumType").value("CRC32C");
stringer.key("timestamp").value(timestamp);
/*
* The timestamp string is for human consumption, automated stuff should use
* the actual timestamp
*/
stringer.key("timestampString").value(SnapshotUtil.formatHumanReadableDate(timestamp));
if (!isReplicated) {
stringer.key("partitionIds").array();
for (int partitionId : partitionIds) {
stringer.value(partitionId);
}
stringer.endArray();
stringer.key("numPartitions").value(numPartitions);
}
stringer.endObject();
String jsonString = stringer.toString();
JSONObject jsonObj = new JSONObject(jsonString);
jsonString = jsonObj.toString(4);
jsonBytes = jsonString.getBytes("UTF-8");
} catch (Exception e) {
throw new IOException(e);
}
fs.writeInt(jsonBytes.length);
fs.write(jsonBytes);
final BBContainer container = fs.getBBContainer();
container.b.position(4);
container.b.putInt(container.b.remaining() - 4);
container.b.position(0);
final byte schemaBytes[] = PrivateVoltTableFactory.getSchemaBytes(schemaTable);
final PureJavaCrc32 crc = new PureJavaCrc32();
ByteBuffer aggregateBuffer = ByteBuffer.allocate(container.b.remaining() + schemaBytes.length);
aggregateBuffer.put(container.b);
aggregateBuffer.put(schemaBytes);
aggregateBuffer.flip();
crc.update(aggregateBuffer.array(), 4, aggregateBuffer.capacity() - 4);
final int crcValue = (int) crc.getValue();
aggregateBuffer.putInt(crcValue).position(8);
aggregateBuffer.put((byte) 0).position(0); // Haven't actually finished writing file
if (m_simulateFullDiskWritingHeader) {
m_writeException = new IOException("Disk full");
m_writeFailed = true;
m_fos.close();
throw m_writeException;
}
/*
* Be completely sure the write succeeded. If it didn't
* the disk is probably full or the path is bunk etc.
*/
m_acceptOneWrite = true;
ListenableFuture<?> writeFuture =
write(Callables.returning((BBContainer) DBBPool.wrapBB(aggregateBuffer)), false);
try {
writeFuture.get();
} catch (InterruptedException e) {
m_fos.close();
throw new java.io.InterruptedIOException();
} catch (ExecutionException e) {
m_fos.close();
throw m_writeException;
}
if (m_writeFailed) {
m_fos.close();
throw m_writeException;
}
ScheduledFuture<?> syncTask = null;
syncTask =
m_syncService.scheduleAtFixedRate(
new Runnable() {
@Override
public void run() {
// Only sync for at least 4 megabyte of data, enough to amortize the cost of seeking
// on ye olden platters. Since we are appending to a file it's actually 2 seeks.
while (m_bytesWrittenSinceLastSync.get() > (1024 * 1024 * 4)) {
final int bytesSinceLastSync = m_bytesWrittenSinceLastSync.getAndSet(0);
try {
m_channel.force(false);
} catch (IOException e) {
if (!(e instanceof java.nio.channels.AsynchronousCloseException)) {
SNAP_LOG.error("Error syncing snapshot", e);
} else {
SNAP_LOG.debug(
"Asynchronous close syncing snasphot data, presumably graceful", e);
}
}
m_bytesAllowedBeforeSync.release(bytesSinceLastSync);
}
}
},
SNAPSHOT_SYNC_FREQUENCY,
SNAPSHOT_SYNC_FREQUENCY,
TimeUnit.MILLISECONDS);
m_syncTask = syncTask;
}
/**
* Compile and cache the statement and plan and return the final plan graph.
*
* @param sql
* @param paramCount
*/
public List<AbstractPlanNode> compile(
String sql,
int paramCount,
String joinOrder,
Object partitionParameter,
boolean inferSP,
boolean lockInSP) {
Statement catalogStmt = proc.getStatements().add("stmt-" + String.valueOf(compileCounter++));
catalogStmt.setSqltext(sql);
catalogStmt.setSinglepartition(partitionParameter != null);
catalogStmt.setBatched(false);
catalogStmt.setParamnum(paramCount);
// determine the type of the query
QueryType qtype = QueryType.SELECT;
catalogStmt.setReadonly(true);
if (sql.toLowerCase().startsWith("insert")) {
qtype = QueryType.INSERT;
catalogStmt.setReadonly(false);
}
if (sql.toLowerCase().startsWith("update")) {
qtype = QueryType.UPDATE;
catalogStmt.setReadonly(false);
}
if (sql.toLowerCase().startsWith("delete")) {
qtype = QueryType.DELETE;
catalogStmt.setReadonly(false);
}
catalogStmt.setQuerytype(qtype.getValue());
// name will look like "basename-stmt-#"
String name = catalogStmt.getParent().getTypeName() + "-" + catalogStmt.getTypeName();
DatabaseEstimates estimates = new DatabaseEstimates();
TrivialCostModel costModel = new TrivialCostModel();
PartitioningForStatement partitioning =
new PartitioningForStatement(partitionParameter, inferSP, lockInSP);
QueryPlanner planner =
new QueryPlanner(
catalogStmt.getSqltext(),
catalogStmt.getTypeName(),
catalogStmt.getParent().getTypeName(),
catalog.getClusters().get("cluster"),
db,
partitioning,
hsql,
estimates,
false,
StatementCompiler.DEFAULT_MAX_JOIN_TABLES,
costModel,
null,
joinOrder);
CompiledPlan plan = null;
planner.parse();
plan = planner.plan();
assert (plan != null);
// Input Parameters
// We will need to update the system catalogs with this new information
// If this is an adhoc query then there won't be any parameters
for (int i = 0; i < plan.parameters.length; ++i) {
StmtParameter catalogParam = catalogStmt.getParameters().add(String.valueOf(i));
catalogParam.setJavatype(plan.parameters[i].getValue());
catalogParam.setIndex(i);
}
// Output Columns
int index = 0;
for (SchemaColumn col : plan.columns.getColumns()) {
Column catColumn = catalogStmt.getOutput_columns().add(String.valueOf(index));
catColumn.setNullable(false);
catColumn.setIndex(index);
catColumn.setName(col.getColumnName());
catColumn.setType(col.getType().getValue());
catColumn.setSize(col.getSize());
index++;
}
List<PlanNodeList> nodeLists = new ArrayList<PlanNodeList>();
nodeLists.add(new PlanNodeList(plan.rootPlanGraph));
if (plan.subPlanGraph != null) {
nodeLists.add(new PlanNodeList(plan.subPlanGraph));
}
// Store the list of parameters types and indexes in the plan node list.
List<Pair<Integer, VoltType>> parameters = nodeLists.get(0).getParameters();
for (int i = 0; i < plan.parameters.length; ++i) {
Pair<Integer, VoltType> parameter = new Pair<Integer, VoltType>(i, plan.parameters[i]);
parameters.add(parameter);
}
// Now update our catalog information
// HACK: We're using the node_tree's hashCode() as it's name. It would be really
// nice if the Catalog code give us an guid without needing a name first...
String json = null;
try {
JSONObject jobj = new JSONObject(nodeLists.get(0).toJSONString());
json = jobj.toString(4);
} catch (JSONException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
System.exit(-1);
}
//
// We then stick a serialized version of PlanNodeTree into a PlanFragment
//
try {
BuildDirectoryUtils.writeFile("statement-plans", name + "_json.txt", json);
BuildDirectoryUtils.writeFile(
"statement-plans", name + ".dot", nodeLists.get(0).toDOTString("name"));
} catch (Exception e) {
e.printStackTrace();
}
List<AbstractPlanNode> plannodes = new ArrayList<AbstractPlanNode>();
for (PlanNodeList nodeList : nodeLists) {
plannodes.add(nodeList.getRootPlanNode());
}
m_currentPlan = plan;
return plannodes;
}