public class CobarFailureDetecter extends DefaultDataSourceFailureDetecter {
private static final Log LOG = LogFactory.getLog(CobarFailureDetecter.class);
private int queryTimeoutSeconds = 30;
public CobarFailureDetecter() {
this.setValidateSql("SHOW COBAR_STATUS");
}
public int getQueryTimeoutSeconds() {
return queryTimeoutSeconds;
}
public void setQueryTimeoutSeconds(int queryTimeoutSeconds) {
this.queryTimeoutSeconds = queryTimeoutSeconds;
}
public boolean isValidConnection(DruidDataSource dataSource, Connection conn) {
Statement stmt = null;
ResultSet rs = null;
try {
stmt = conn.createStatement();
stmt.setQueryTimeout(queryTimeoutSeconds);
rs = stmt.executeQuery(getValidateSql());
if (!rs.next()) {
return false;
}
String status = rs.getString(1);
if ("on".equalsIgnoreCase(status)) {
return true;
} else {
return false;
}
} catch (Exception ex) {
LOG.error("check datasource valid errror", ex);
return false;
} finally {
JdbcUtils.close(rs);
JdbcUtils.close(stmt);
}
}
}
public class MockDriver implements Driver, MockDriverMBean {
private static final Log LOG = LogFactory.getLog(MockDriver.class);
public static final MockExecuteHandler DEFAULT_HANDLER = new MySqlMockExecuteHandlerImpl();
private String prefix = "jdbc:fake:";
private String mockPrefix = "jdbc:mock:";
private MockExecuteHandler executeHandler = DEFAULT_HANDLER;
public static final MockDriver instance = new MockDriver();
private final AtomicLong connectCount = new AtomicLong();
private final AtomicLong connectionCloseCount = new AtomicLong();
private final AtomicLong connectionIdSeed = new AtomicLong(1000L);
private final List<MockConnection> connections = new CopyOnWriteArrayList<MockConnection>();
private long idleTimeCount = 1000 * 60 * 3;
private boolean logExecuteQueryEnable = true;
private static final String MBEAN_NAME = "com.alibaba.druid:type=MockDriver";
static {
registerDriver(instance);
}
public boolean isLogExecuteQueryEnable() {
return logExecuteQueryEnable;
}
public void setLogExecuteQueryEnable(boolean logExecuteQueryEnable) {
this.logExecuteQueryEnable = logExecuteQueryEnable;
}
public long getIdleTimeCount() {
return idleTimeCount;
}
public void setIdleTimeCount(long idleTimeCount) {
this.idleTimeCount = idleTimeCount;
}
public long generateConnectionId() {
return connectionIdSeed.incrementAndGet();
}
public void closeAllConnections() throws SQLException {
for (int i = 0, size = this.connections.size(); i < size; ++i) {
Connection conn = this.connections.get(size - i - 1);
conn.close();
}
}
public int getConnectionsSize() {
return this.connections.size();
}
public List<MockConnection> getConnections() {
return connections;
}
protected void incrementConnectionCloseCount() {
connectionCloseCount.incrementAndGet();
}
public long getConnectionCloseCount() {
return connectionCloseCount.get();
}
protected void afterConnectionClose(MockConnection conn) {
connectionCloseCount.incrementAndGet();
connections.remove(conn);
if (LOG.isDebugEnabled()) {
LOG.debug("conn-" + conn.getId() + " close");
}
}
public static boolean registerDriver(Driver driver) {
try {
DriverManager.registerDriver(driver);
try {
MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();
ObjectName objectName = new ObjectName(MBEAN_NAME);
if (!mbeanServer.isRegistered(objectName)) {
mbeanServer.registerMBean(instance, objectName);
}
} catch (Exception ex) {
LOG.error("register druid-driver mbean error", ex);
}
return true;
} catch (Exception e) {
LOG.error("registerDriver error", e);
}
return false;
}
public MockExecuteHandler getExecuteHandler() {
return executeHandler;
}
public void setExecuteHandler(MockExecuteHandler executeHandler) {
this.executeHandler = executeHandler;
}
@Override
public Connection connect(String url, Properties info) throws SQLException {
if (!acceptsURL(url)) {
return null;
}
if (info != null) {
Object val = info.get("connectSleep");
if (val != null) {
long millis = Long.parseLong(val.toString());
try {
Thread.sleep(millis);
} catch (InterruptedException e) {
// skip
}
}
}
MockConnection conn = new MockConnection(this, url, info);
if (LOG.isDebugEnabled()) {
LOG.debug("connect, url " + url + ", id " + conn.getId());
}
if (url == null) {
connectCount.incrementAndGet();
connections.add(conn);
return conn;
}
if (url.startsWith(prefix)) {
String catalog = url.substring(prefix.length());
conn.setCatalog(catalog);
connectCount.incrementAndGet();
connections.add(conn);
return conn;
}
if (url.startsWith(mockPrefix)) {
String catalog = url.substring(mockPrefix.length());
conn.setCatalog(catalog);
connectCount.incrementAndGet();
connections.add(conn);
return conn;
}
return null;
}
@Override
public boolean acceptsURL(String url) throws SQLException {
if (url == null) {
return false;
}
return url.startsWith(prefix) || url.startsWith(mockPrefix);
}
@Override
public DriverPropertyInfo[] getPropertyInfo(String url, Properties info) throws SQLException {
return null;
}
@Override
public int getMajorVersion() {
return 0;
}
@Override
public int getMinorVersion() {
return 0;
}
@Override
public boolean jdbcCompliant() {
return true;
}
protected ResultSet executeQuery(MockStatement stmt, String sql) throws SQLException {
if (logExecuteQueryEnable && LOG.isDebugEnabled()) {
LOG.debug("executeQuery " + sql);
}
MockConnection conn = stmt.getMockConnection();
long idleTimeMillis = System.currentTimeMillis() - conn.getLastActiveTimeMillis();
if (idleTimeMillis >= this.idleTimeCount) {
throw new SQLException("connection is idle time count");
}
conn.setLastActiveTimeMillis(System.currentTimeMillis());
if (conn != null) {
if (conn.getConnectProperties() != null) {
Object propertyValue = conn.getConnectProperties().get("executeSleep");
if (propertyValue != null) {
long millis = Long.parseLong(propertyValue.toString());
try {
Thread.sleep(millis);
} catch (InterruptedException e) {
// skip
}
}
}
}
if ("SELECT value FROM _int_1000_".equalsIgnoreCase(sql)) {
MockResultSet rs = new MockResultSet(stmt);
for (int i = 0; i < 1000; ++i) {
rs.getRows().add(new Object[] {i});
}
return rs;
}
return this.executeHandler.executeQuery(stmt, sql);
}
protected ResultSet createResultSet(MockPreparedStatement stmt) {
MockResultSet rs = new MockResultSet(stmt);
String sql = stmt.getSql();
if ("SELECT 1".equalsIgnoreCase(sql)) {
rs.getRows().add(new Object[] {1});
} else if ("SELECT NOW()".equalsIgnoreCase(sql)) {
rs.getRows().add(new Object[] {new java.sql.Timestamp(System.currentTimeMillis())});
} else if ("SELECT ?".equalsIgnoreCase(sql)) {
rs.getRows().add(new Object[] {stmt.getParameters().get(0)});
}
return rs;
}
protected Clob createClob(MockConnection conn) throws SQLException {
return new MockClob();
}
protected Blob createBlob(MockConnection conn) throws SQLException {
return new MockBlob();
}
protected NClob createNClob(MockConnection conn) throws SQLException {
return new MockNClob();
}
protected SQLXML createSQLXML(MockConnection conn) throws SQLException {
return new MockSQLXML();
}
public Logger getParentLogger() throws SQLFeatureNotSupportedException {
throw new SQLFeatureNotSupportedException();
}
}
