public boolean killQuery(QueryId queryId) throws ServiceException, IOException {
QueryStatus status = getQueryStatus(queryId);
try {
/* send a kill to the TM */
service.killQuery(null, queryId.getProto());
long currentTimeMillis = System.currentTimeMillis();
long timeKillIssued = currentTimeMillis;
while ((currentTimeMillis < timeKillIssued + 10000L)
&& (status.getState() != QueryState.QUERY_KILLED)) {
try {
Thread.sleep(1000L);
} catch (InterruptedException ie) {
/** interrupted, just break */
break;
}
currentTimeMillis = System.currentTimeMillis();
status = getQueryStatus(queryId);
}
} catch (ServiceException io) {
LOG.debug("Error when checking for application status", io);
return false;
}
return true;
}
public TableDesc attachTable(String name, String path) throws ServiceException {
AttachTableRequest.Builder builder = AttachTableRequest.newBuilder();
builder.setName(name);
builder.setPath(path);
TableResponse res = service.attachTable(null, builder.build());
return TCatUtil.newTableDesc(res.getTableDesc());
}
public boolean updateQuery(String tql) throws ServiceException {
QueryRequest.Builder builder = QueryRequest.newBuilder();
builder.setQuery(tql);
ResultCode resultCode = service.updateQuery(null, builder.build()).getResultCode();
return resultCode == ResultCode.OK;
}
public TableDesc createTable(String name, Path path, TableMeta meta) throws ServiceException {
CreateTableRequest.Builder builder = CreateTableRequest.newBuilder();
builder.setName(name);
builder.setPath(path.toString());
builder.setMeta(meta.getProto());
TableResponse res = service.createTable(null, builder.build());
return TCatUtil.newTableDesc(res.getTableDesc());
}
public QueryStatus getQueryStatus(QueryId queryId) throws ServiceException {
GetQueryStatusRequest.Builder builder = GetQueryStatusRequest.newBuilder();
builder.setQueryId(queryId.getProto());
GetQueryStatusResponse res = service.getQueryStatus(null, builder.build());
return new QueryStatus(res);
}
public TableDesc getTableDesc(String tableName) throws ServiceException {
GetTableDescRequest.Builder build = GetTableDescRequest.newBuilder();
build.setTableName(tableName);
TableResponse res = service.getTableDesc(null, build.build());
if (res == null) {
return null;
} else {
return TCatUtil.newTableDesc(res.getTableDesc());
}
}
public TableDesc getResultDesc(QueryId queryId) throws ServiceException {
if (queryId.equals(TajoIdUtils.NullQueryId)) {
return null;
}
GetQueryResultRequest.Builder builder = GetQueryResultRequest.newBuilder();
builder.setQueryId(queryId.getProto());
GetQueryResultResponse response = service.getQueryResult(null, builder.build());
return TCatUtil.newTableDesc(response.getTableDesc());
}
/**
* It submits a query statement and get a response. The main difference from {@link
* #executeQuery(String)} is a blocking method. So, this method is wait for the finish of the
* submitted query.
*
* @return If failed, return null.
*/
public ResultSet executeQueryAndGetResult(String tql) throws ServiceException, IOException {
QueryRequest.Builder builder = QueryRequest.newBuilder();
builder.setQuery(tql);
SubmitQueryRespose response = service.submitQuery(null, builder.build());
QueryId queryId = new QueryId(response.getQueryId());
if (queryId.equals(TajoIdUtils.NullQueryId)) {
return null;
}
return getQueryResultAndWait(queryId);
}
/**
* It submits a query statement and get a response immediately. The response only contains a query
* id, and submission status. In order to get the result, you should use {@link
* #getQueryResult(tajo.QueryId)} or {@link #getQueryResultAndWait(tajo.QueryId)}.
*/
public SubmitQueryRespose executeQuery(String tql) throws ServiceException {
QueryRequest.Builder builder = QueryRequest.newBuilder();
builder.setQuery(tql);
return service.submitQuery(null, builder.build());
}
/**
* Get a list of table names. All table and column names are represented as lower-case letters.
*/
public List<String> getTableList() throws ServiceException {
GetTableListRequest.Builder builder = GetTableListRequest.newBuilder();
GetTableListResponse res = service.getTableList(null, builder.build());
return res.getTablesList();
}
public boolean dropTable(String name) throws ServiceException {
StringProto.Builder builder = StringProto.newBuilder();
builder.setValue(name);
return service.dropTable(null, builder.build()).getValue();
}