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TDengine

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提交 0fcdb5ae 编写于 作者: X xieyinglin
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print the java.library.path variable for debug 

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src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBJNIConnector.java
浏览文件 @ 0fcdb5ae
......@@ -19,102 +19,104 @@ import java.sql.SQLWarning;
import java.util.List;
public class TSDBJNIConnector {
static volatile Boolean isInitialized = false;
static {
System.loadLibrary("taos");
}
/**
* Connection pointer used in C
*/
private long taos = TSDBConstants.JNI_NULL_POINTER;
/**
* Result set pointer for the current connection
*/
private long taosResultSetPointer = TSDBConstants.JNI_NULL_POINTER;
/**
* result set status in current connection
*/
private boolean isResultsetClosed = true;
private int affectedRows = -1;
/**
* Whether the connection is closed
*/
public boolean isClosed() {
return this.taos == TSDBConstants.JNI_NULL_POINTER;
}
/**
* Returns the status of last result set in current connection
* @return
*/
public boolean isResultsetClosed() {
return this.isResultsetClosed;
}
/**
* Initialize static variables in JNI to optimize performance
*/
public static void init(String configDir, String locale, String charset, String timezone) throws SQLWarning {
synchronized(isInitialized) {
if (!isInitialized) {
initImp(configDir);
if (setOptions(0, locale) < 0) {
throw new SQLWarning(TSDBConstants.WrapErrMsg("Failed to set locale: " + locale + ". System default will be used."));
}
static volatile Boolean isInitialized = false;
static {
System.loadLibrary("taos");
System.out.println("java.library.path:" + System.getProperty("java.library.path"));
}
/**
* Connection pointer used in C
*/
private long taos = TSDBConstants.JNI_NULL_POINTER;
/**
* Result set pointer for the current connection
*/
private long taosResultSetPointer = TSDBConstants.JNI_NULL_POINTER;
/**
* result set status in current connection
*/
private boolean isResultsetClosed = true;
private int affectedRows = -1;
/**
* Whether the connection is closed
*/
public boolean isClosed() {
return this.taos == TSDBConstants.JNI_NULL_POINTER;
}
/**
* Returns the status of last result set in current connection
*
* @return
*/
public boolean isResultsetClosed() {
return this.isResultsetClosed;
}
/**
* Initialize static variables in JNI to optimize performance
*/
public static void init(String configDir, String locale, String charset, String timezone) throws SQLWarning {
synchronized (isInitialized) {
if (!isInitialized) {
initImp(configDir);
if (setOptions(0, locale) < 0) {
throw new SQLWarning(TSDBConstants.WrapErrMsg("Failed to set locale: " + locale + ". System default will be used."));
}
if (setOptions(1, charset) < 0) {
throw new SQLWarning(TSDBConstants.WrapErrMsg("Failed to set charset: " + charset + ". System default will be used."));
}
if (setOptions(2, timezone) < 0) {
throw new SQLWarning(TSDBConstants.WrapErrMsg("Failed to set timezone: " + timezone + ". System default will be used."));
}
isInitialized = true;
TaosGlobalConfig.setCharset(getTsCharset());
}
}
}
if (setOptions(2, timezone) < 0) {
throw new SQLWarning(TSDBConstants.WrapErrMsg("Failed to set timezone: " + timezone + ". System default will be used."));
}
isInitialized = true;
TaosGlobalConfig.setCharset(getTsCharset());
}
}
}
public static native void initImp(String configDir);
public static native void initImp(String configDir);
public static native int setOptions(int optionIndex, String optionValue);
public static native int setOptions(int optionIndex, String optionValue);
public static native String getTsCharset();
/**
* Get connection pointer
*
* @throws SQLException
*/
public boolean connect(String host, int port, String dbName, String user, String password) throws SQLException {
if (this.taos != TSDBConstants.JNI_NULL_POINTER) {
this.closeConnectionImp(this.taos);
this.taos = TSDBConstants.JNI_NULL_POINTER;
}
this.taos = this.connectImp(host, port, dbName, user, password);
if (this.taos == TSDBConstants.JNI_NULL_POINTER) {
throw new SQLException(TSDBConstants.WrapErrMsg(this.getErrMsg()), "", this.getErrCode());
}
return true;
}
private native long connectImp(String host, int port, String dbName, String user, String password);
/**
* Execute DML/DDL operation
*
* @throws SQLException
*/
public int executeQuery(String sql) throws SQLException {
/**
* Get connection pointer
*
* @throws SQLException
*/
public boolean connect(String host, int port, String dbName, String user, String password) throws SQLException {
if (this.taos != TSDBConstants.JNI_NULL_POINTER) {
this.closeConnectionImp(this.taos);
this.taos = TSDBConstants.JNI_NULL_POINTER;
}
this.taos = this.connectImp(host, port, dbName, user, password);
if (this.taos == TSDBConstants.JNI_NULL_POINTER) {
throw new SQLException(TSDBConstants.WrapErrMsg(this.getErrMsg()), "", this.getErrCode());
}
return true;
}
private native long connectImp(String host, int port, String dbName, String user, String password);
/**
* Execute DML/DDL operation
*
* @throws SQLException
*/
public int executeQuery(String sql) throws SQLException {
if (!this.isResultsetClosed) {
freeResultSet(taosResultSetPointer);
freeResultSet(taosResultSetPointer);
}
int code;
try {
code = this.executeQueryImp(sql.getBytes(TaosGlobalConfig.getCharset()), this.taos);
......@@ -122,7 +124,7 @@ public class TSDBJNIConnector {
e.printStackTrace();
throw new SQLException(TSDBConstants.WrapErrMsg("Unsupported encoding"));
}
affectedRows = code;
affectedRows = code;
if (code < 0) {
affectedRows = -1;
if (code == TSDBConstants.JNI_TDENGINE_ERROR) {
......@@ -140,157 +142,159 @@ public class TSDBJNIConnector {
isResultsetClosed = false;
}
return code;
}
}
private native int executeQueryImp(byte[] sqlBytes, long connection);
private native int executeQueryImp(byte[] sqlBytes, long connection);
/**
* Get recent error code by connection
*/
public int getErrCode() {
return Math.abs(this.getErrCodeImp(this.taos));
}
/**
* Get recent error code by connection
*/
public int getErrCode() {
return Math.abs(this.getErrCodeImp(this.taos));
}
private native int getErrCodeImp(long connection);
private native int getErrCodeImp(long connection);
/**
* Get recent error message by connection
*/
public String getErrMsg() {
return this.getErrMsgImp(this.taos);
}
/**
* Get recent error message by connection
*/
public String getErrMsg() {
return this.getErrMsgImp(this.taos);
}
private native String getErrMsgImp(long connection);
private native String getErrMsgImp(long connection);
/**
* Get resultset pointer
/**
* Get resultset pointer
* Each connection should have a single open result set at a time
*/
public long getResultSet() {
*/
public long getResultSet() {
return taosResultSetPointer;
}
}
private native long getResultSetImp(long connection);
private native long getResultSetImp(long connection);
/**
* Free resultset operation from C to release resultset pointer by JNI
*/
public int freeResultSet(long result) {
/**
* Free resultset operation from C to release resultset pointer by JNI
*/
public int freeResultSet(long result) {
int res = TSDBConstants.JNI_SUCCESS;
if (result != taosResultSetPointer && taosResultSetPointer != TSDBConstants.JNI_NULL_POINTER) {
throw new RuntimeException("Invalid result set pointer");
} else if (taosResultSetPointer != TSDBConstants.JNI_NULL_POINTER){
} else if (taosResultSetPointer != TSDBConstants.JNI_NULL_POINTER) {
res = this.freeResultSetImp(this.taos, result);
isResultsetClosed = true; // reset resultSetPointer to 0 after freeResultSetImp() return
taosResultSetPointer = TSDBConstants.JNI_NULL_POINTER;
} else {
isResultsetClosed = true;
}
}
return res;
}
}
/**
* Close the open result set which is associated to the current connection. If the result set is already
* closed, return 0 for success.
*
* @return
*/
public int freeResultSet() {
int resCode = TSDBConstants.JNI_SUCCESS;
public int freeResultSet() {
int resCode = TSDBConstants.JNI_SUCCESS;
if (!isResultsetClosed) {
resCode = this.freeResultSetImp(this.taos, this.taosResultSetPointer);
taosResultSetPointer = TSDBConstants.JNI_NULL_POINTER;
isResultsetClosed = true;
isResultsetClosed = true;
}
return resCode;
}
private native int freeResultSetImp(long connection, long result);
private native int freeResultSetImp(long connection, long result);
/**
* Get affected rows count
*/
public int getAffectedRows() {
int affectedRows = this.affectedRows;
/**
* Get affected rows count
*/
public int getAffectedRows() {
int affectedRows = this.affectedRows;
if (affectedRows < 0) {
affectedRows = this.getAffectedRowsImp(this.taos);
}
return affectedRows;
}
private native int getAffectedRowsImp(long connection);
/**
* Get schema metadata
*/
public int getSchemaMetaData(long resultSet, List<ColumnMetaData> columnMetaData) {
return this.getSchemaMetaDataImp(this.taos, resultSet, columnMetaData);
}
private native int getSchemaMetaDataImp(long connection, long resultSet, List<ColumnMetaData> columnMetaData);
/**
* Get one row data
*/
public int fetchRow(long resultSet, TSDBResultSetRowData rowData) {
return this.fetchRowImp(this.taos, resultSet, rowData);
}
private native int fetchRowImp(long connection, long resultSet, TSDBResultSetRowData rowData);
/**
* Execute close operation from C to release connection pointer by JNI
*
* @throws SQLException
*/
public void closeConnection() throws SQLException {
int code = this.closeConnectionImp(this.taos);
if (code < 0) {
throw new SQLException(TSDBConstants.FixErrMsg(code), "", this.getErrCode());
} else if (code == 0){
this.taos = TSDBConstants.JNI_NULL_POINTER;
} else {
throw new SQLException("Undefined error code returned by TDengine when closing a connection");
}
private native int getAffectedRowsImp(long connection);
/**
* Get schema metadata
*/
public int getSchemaMetaData(long resultSet, List<ColumnMetaData> columnMetaData) {
return this.getSchemaMetaDataImp(this.taos, resultSet, columnMetaData);
}
private native int getSchemaMetaDataImp(long connection, long resultSet, List<ColumnMetaData> columnMetaData);
/**
* Get one row data
*/
public int fetchRow(long resultSet, TSDBResultSetRowData rowData) {
return this.fetchRowImp(this.taos, resultSet, rowData);
}
private native int fetchRowImp(long connection, long resultSet, TSDBResultSetRowData rowData);
/**
* Execute close operation from C to release connection pointer by JNI
*
* @throws SQLException
*/
public void closeConnection() throws SQLException {
int code = this.closeConnectionImp(this.taos);
if (code < 0) {
throw new SQLException(TSDBConstants.FixErrMsg(code), "", this.getErrCode());
} else if (code == 0) {
this.taos = TSDBConstants.JNI_NULL_POINTER;
} else {
throw new SQLException("Undefined error code returned by TDengine when closing a connection");
}
}
private native int closeConnectionImp(long connection);
/**
* Subscribe to a table in TSDB
*/
public long subscribe(String host, String user, String password, String database, String table, long time, int period){
return subscribeImp(host, user, password, database, table, time, period);
}
private native long subscribeImp(String host, String user, String password, String database, String table, long time, int period);
/**
* Consume a subscribed table
*/
public TSDBResultSetRowData consume(long subscription) {
return this.consumeImp(subscription);
}
private native TSDBResultSetRowData consumeImp(long subscription);
/**
* Unsubscribe a table
* @param subscription
*/
public void unsubscribe(long subscription) {
unsubscribeImp(subscription);
}
private native void unsubscribeImp(long subscription);
/**
* Validate if a <I>create table</I> sql statement is correct without actually creating that table
*/
public boolean validateCreateTableSql(String sql) {
long connection = taos;
int res = validateCreateTableSqlImp(connection, sql.getBytes());
}
private native int closeConnectionImp(long connection);
/**
* Subscribe to a table in TSDB
*/
public long subscribe(String host, String user, String password, String database, String table, long time, int period) {
return subscribeImp(host, user, password, database, table, time, period);
}
private native long subscribeImp(String host, String user, String password, String database, String table, long time, int period);
/**
* Consume a subscribed table
*/
public TSDBResultSetRowData consume(long subscription) {
return this.consumeImp(subscription);
}
private native TSDBResultSetRowData consumeImp(long subscription);
/**
* Unsubscribe a table
*
* @param subscription
*/
public void unsubscribe(long subscription) {
unsubscribeImp(subscription);
}
private native void unsubscribeImp(long subscription);
/**
* Validate if a <I>create table</I> sql statement is correct without actually creating that table
*/
public boolean validateCreateTableSql(String sql) {
long connection = taos;
int res = validateCreateTableSqlImp(connection, sql.getBytes());
return res != 0 ? false : true;
}
}
private native int validateCreateTableSqlImp(long connection, byte[] sqlBytes);
private native int validateCreateTableSqlImp(long connection, byte[] sqlBytes);
}
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