Here is the stack trace:
java.sql.SQLException
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:290)
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:182)
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:702)
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:634)
at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:488)
at org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:144)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:116)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:103)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.getConnection(DataSourceProxy.java:127)
at com.boeing.DBReader.Server.makeConnection(Server.java:85)
at com.boeing.DBReader.Server.<init>(Server.java:26)
at com.boeing.DBReader.Reader.main(Reader.java:13)
Caused by: java.lang.NullPointerException
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:395)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:278)
... 11 more
Connection closed
And here is the code:
public class Server
{
private DataSource datasource;
public Server()
{
try
{
createConnectionToDatabase();
} catch (Exception e)
{
// TODO Auto-generated catch block
System.out.println("Exception:" + e.toString());
}
makeConnection();
}
private void createConnectionToDatabase() throws Exception
{
String connectionString = null;
String login = null;
String password = null;
System.out.println("In createConnectionToDatabase");
PoolProperties p = new PoolProperties();
p.setUrl("jdbc:oracle:thin:#***");
p.setUrl(connectionString);
p.setDriverClassName("oracle.jdbc.OracleDriver");
p.setUsername("**");
p.setPassword("**");
p.setJmxEnabled(true);
p.setTestWhileIdle(false);
p.setTestOnBorrow(true);
p.setValidationQuery("SELECT 1 from dual");
p.setTestOnReturn(false);
p.setValidationInterval(30000);
p.setTimeBetweenEvictionRunsMillis(30000);
p.setMaxActive(100);
p.setInitialSize(10);
p.setMaxWait(10000);
p.setRemoveAbandonedTimeout(600);
p.setMinEvictableIdleTimeMillis(30000);
p.setMinIdle(10);
p.setLogAbandoned(true);
p.setRemoveAbandoned(true);
p.setJdbcInterceptors("org.apache.tomcat.jdbc.pool.interceptor.ConnectionState;"
+ "org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer");
datasource = new DataSource();
datasource.setPoolProperties(p);
}
private void closeConnection(Connection con) {
if (con != null) {
try {
con.close();
} catch (Exception ignore) {
System.out.println("Could not close connection, WTF?");
}
}
}
private void makeConnection()
{
Connection con = null;
String queryString = "SQL QUERY GOES HERE ";
try {
System.out.println("Connection attempt");
con = datasource.getConnection();
System.out.println("Connection made no issues");
} catch (Exception e) {
System.out.println("Exception:" + e.toString());
e.printStackTrace();
} finally {
closeConnection(con);
System.out.println("Connection closed");
}
}
I have the driver attached to the build path.. What am I doing wrong? This is set up without maven, and just a normal java project.
Thanks!
Not entirely sure from the stack trace, but this looks wrong:
String connectionString = null;
String login = null;
String password = null;
System.out.println("In createConnectionToDatabase");
PoolProperties p = new PoolProperties();
p.setUrl("jdbc:oracle:thin:#***");
p.setUrl(connectionString);
You're setting the URL to connectionString, which is null.
Related
#Override
public byte[] findByusernameAndtenantId(String username,int tenantId) throws SQLException {
Connection con=null;
Blob img ;
byte[] imgData = null ;
try {
Class.forName("org.apache.cassandra.cql.jdbc.CassandraDriver");
con=DriverManager.getConnection("jdbc:cassandra://169.46.155.77:9042/demo");
String query = "SELECT PHOTO FROM demo.IGNITE_USERS where USER_NAME=? and TENANT_ID=?";
Statement stmt = con.createStatement();
ResultSet result = stmt.executeQuery(query);
while (result.next ())
{
img = result.getBlob(1);
imgData = img.getBytes(1,(int)img.length());
}
result.close();
stmt.close();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
} finally {
if (con != null)
try{
con.close();
}
catch (SQLException e) {
e.printStackTrace();
}
con = null;
}
return imgData ;
}
this is my implementation code .
#RequestMapping(value ="/Image",method = RequestMethod.POST, produces="image/jpg")
public ResponseEntity<byte[]> getImage(#RequestParam String username,#RequestParam int tenantId) throws SQLException
{
byte[] img=null;
img=authService.findByusernameAndtenantId(username,tenantId);
System.out.println("testing functionality");
return new ResponseEntity<byte[]>(img, HttpStatus.OK);
}
this is my controller code
when I run the spring boot program , and do a POST call in Postman client to get the image I am getting Class not found exception : org.apache.cassandra.cql.jdbc.Cassandra Driver.
Can you please help me how to return that image from cassandra DB stored as Blob ?
I have a Java EE web application. I am connecting database with JDBC and I am using JDBC connection pool. My application's main page is login page. After I enter the login page and wait for a while, I take this glassfish server(4.1.0) warning consistently.
Warning: RAR5035:Unexpected exception while destroying resource from
pool OraclePool. Exception message: Error while destroying resource
:IO Error: Socket read timed out
Even if I don't do any action on the page. When I monitore the statistics of the connection pool, NumConnCreated is increasing continuously. How can I solve the problem?. Thank you.
This is my managed bean class.
#ManagedBean
#SessionScoped
public class Login implements Serializable{
private String userName;
private String password;
private User user;
private #EJB DBRemote db;
public void test(){
String[] params1 = {"user","1234"};
int[] getParams = {Types.INTEGER,Types.VARCHAR,Types.VARCHAR,Types.VARCHAR};
CallableStatement statement = db.run("TBL.USERLOGIN(?,?,?,?,?,?)", params1 , getParams);
try {
int isLogin = statement.getInt(3);
if (isLogin==1) {
String uName = statement.getString(4);
String uId = statement.getString(5);
user = new User(uId, uName, isLogin);
System.out.println("LOGGED IN " + uName + "\t" + uId);
}else{
String errMessage = statement.getString(6);
user = new User(errMessage,isLogin);
System.out.println("LOG IN FAILURE " + errMessage);
}
} catch (SQLException ex) {
Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex);
}finally{
db.close();
FacesContext.getCurrentInstance().addMessage("infoback", new FacesMessage(FacesMessage.SEVERITY_INFO,
"TEST","Test Works"));
}
}
}
This my interface class
#Remote
public interface DBRemote {
CallableStatement run(String query, String[] setParams, int[] getParams);
void close();
String getErrorMessage();
String getSql();
}
This is my Stateless Bean class
#Stateless
public class DB implements DBRemote{
#Resource(mappedName = "pwresource")
private DataSource ds;
private String sql;
private String errorMessage;
private CallableStatement statement;
private Connection connection;
public DB() {
}
#Override
public CallableStatement run(String query, String[] setParams, int[] getParams){
sql = "{call " + query + "}";
int getParamIndex = setParams.length + 1;
try {
connection = ds.getConnection();
statement = connection.prepareCall(sql);
for (int i = 0; i < setParams.length; i++) {
statement.setString(i+1, setParams[i]);
}
for (int getParam : getParams) {
statement.registerOutParameter(getParamIndex, getParam);
getParamIndex++;
}
statement.execute();
}catch (SQLException ex) {
if (ex.getErrorCode()==17008) {
errorMessage = "Timeout";
}else{
errorMessage = "System Error";
}
Logger.getLogger(DB.class.getName()).log(Level.SEVERE, null, ex);
close();
}
return statement;
}
#Override
public void close(){
try {
if (statement != null) {
statement.close();
}
if(connection != null){
connection.close();
}
errorMessage = null;
} catch (SQLException e) {
errorMessage = "Close Connection Error";
}
}
#Override
public String getErrorMessage() {
return errorMessage;
}
#Override
public String getSql() {
return sql;
}
}
I have solved my problem. My problem is because of the connection between connection pool and database. Database closes the connections automically because of the server and database in different networks caused timeout issue.
I try to connect to Oracle database (check connection status). I'm using following code, which works fine.
public String getDatabaseStatus() {
Connection conn;
try {
conn = DriverManager.getConnection( "jdbc:oracle:thin:#192.168.0.70:1521:XE", "foo","bar");
conn.close();
} catch (Exception e) {
return "ERR - " + e.getMessage();
}
return "Connection succesful";
}
However, when using Websphere datasource, after 10 (connection limit) refreshes page hangs. Code:
public String getDatabaseStatus() {
Connection conn;
try {
Context ctx = new InitialContext();
DataSource ds = (DataSource) ctx.lookup("jdbc/xe");
conn = WSCallHelper.getNativeConnection(ds.getConnection());
} catch (Exception e) {
return "ERR - " + e.getMessage();
}
return "Connection succesful";
}
I tried to close provided connection, but it gives me error:
J2CA0206W - A connection error occurred. To help determine the problem, enable the Diagnose Connection Usage option on the Connection Factory or Data Source. This is the multithreaded access detection option. Alternatively check that the Database or MessageProvider is available.
Any help will be appreciated.
You must close the connection that you received from the DataSource:
public String getDatabaseStatus() {
Connection conn;
try {
Context ctx = new InitialContext();
DataSource ds = (DataSource) ctx.lookup("jdbc/xe");
java.sql.Connection connection = ds.getConnection();
try {
conn = WSCallHelper.getNativeConnection(connection);
} finally {
safeClose(connection);
}
} catch (Exception e) {
return "ERR - " + e.getMessage();
}
return "Connection succesful";
}
private void safeClose(java.sql.Connection connection) {
try {
connection.close();
} catch (SQLException e) {
log.warn("Failed to close database connection", e);
}
}
If you're using Java 7 or better you can simplify it to:
public String getDatabaseStatus() {
Connection conn;
try {
Context ctx = new InitialContext();
DataSource ds = (DataSource) ctx.lookup("jdbc/xe");
try (java.sql.Connection connection = ds.getConnection()) {
conn = WSCallHelper.getNativeConnection(connection);
}
} catch (Exception e) {
return "ERR - " + e.getMessage();
}
return "Connection succesful";
}
If you fail to do this your connections will not be returned to the pool and you will run out of connections.
I am a new for JSP and I dont know any information about connection of oracle with JSP can anyone help me step by step?
You have to look at JDBC for Oracle. Using Java of course, not JSP.
This is a very basic Database class I used to use for very little projects.
public class Database {
private String driverName = "oracle.jdbc.driver.OracleDriver";
private Connection conn;
public static Hashtable errors = null;
public Database(String serverName, String portNumber, String serviceName, String username, String password, String db) {
errors = new Hashtable();
try {
String url = "jdbc:oracle:thin:#" + serverName + ":" + portNumber + ":" + serviceName;
Class.forName(driverName);
this.conn = DriverManager.getConnection(url, username, password);
} catch (Exception e) {
System.out.println(e);
errors.put(db, e);
}
}
public Connection getConnection(){
return this.conn;
}
}
here is a sample of a query
Database db = new Database(......); // see Database class construct
try {
java.sql.Statement st = db.getConnection().createStatement();
ResultSet rs = st.executeQuery("SELECT * FROM FOO");
while(rs.next()){
// your code
}
rs.close();
st.close();
} catch (SQLException ex) {
Logger.getLogger(Table.class.getName()).log(Level.SEVERE, null, ex);
}
hope this helps :)
I keep getting a HTML 404 reply from the server when I try to login via a httppost (https). Not sure if this is a cookie problem or something else. The code should be good as I have copied it from another activity. I need some help.
This is my current code:
public int postData(String usernamne, String password) {
String url = "https://domainname.com/nclogin.submit";
HttpPost httppost = new HttpPost(url);
try {
KeyStore trusted = null;
try {
trusted = KeyStore.getInstance("BKS");
} catch (KeyStoreException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
trusted.load(null, "".toCharArray());
MySSLSocketFactory sslf = null;
try {
sslf = new MySSLSocketFactory(trusted);
} catch (KeyManagementException e) {
Log.d(TAG, "Exception " + e);
// TODO Auto-generated catch block
e.printStackTrace();
} catch (UnrecoverableKeyException e) {
Log.d(TAG, "Exception " + e);
// TODO Auto-generated catch block
e.printStackTrace();
} catch (KeyStoreException e) {
Log.d(TAG, "Exception " + e);
// TODO Auto-generated catch block
e.printStackTrace();
}
sslf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("f_username", "myemail#address.com"));
nameValuePairs.add(new BasicNameValuePair("f_passwd", "mypassword"));
nameValuePairs.add(new BasicNameValuePair("f_method", "LOGIN"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
SchemeRegistry schemeRegistry = new SchemeRegistry();
schemeRegistry.register(new Scheme("https", sslf, 443));
SingleClientConnManager cm = new SingleClientConnManager(httppost.getParams(), schemeRegistry);
// NEW API WONT ALLOW THIS IN THE MAIN THREAD! hence ASYNC
DefaultHttpClient client = new DefaultHttpClient(cm, httppost.getParams());
HttpResponse result = client.execute(httppost);
// Check if server response is valid
StatusLine status = result.getStatusLine();
Log.d(TAG, "STatus" + result.getStatusLine());
if (status.getStatusCode() != 200) {
throw new IOException("Invalid response from server: " + status.toString());
}
HttpEntity entity = result.getEntity();
InputStream is = entity.getContent();
if (is != null) {
is.close(); // release connection
}
String phpsessid = "";
// cookies from another blog
// http://stackoverflow.com/questions/4224913/android-session-management
List cookies = client.getCookieStore().getCookies();
if (cookies.isEmpty()) {
Log.d(TAG, "no cookies received");
} else {
for (int i = 0; i < cookies.size(); i++) {
// Log.d(TAG, "COOKIE-" + i + " " +
// cookies.get(i).toString());
if (cookies.get(i).toString().contains("PHPSESSID")) {
phpsessid = cookies.get(i).toString();
Log.d(TAG, "COOKIE FOR PHPSESSID - " + phpsessid);
}
}
} // end of blog
entity.consumeContent();
client.getConnectionManager().shutdown();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
} catch (NoSuchAlgorithmException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (CertificateException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
return 1;
} // end of postData()
public class MySSLSocketFactory extends SSLSocketFactory {
SSLContext sslContext = SSLContext.getInstance("TLS");
public MySSLSocketFactory(KeyStore truststore)
throws NoSuchAlgorithmException, KeyManagementException,
KeyStoreException, UnrecoverableKeyException {
super(truststore);
TrustManager tm = new X509TrustManager() {
public void checkClientTrusted(X509Certificate[] chain,
String authType) throws CertificateException {
}
public void checkServerTrusted(X509Certificate[] chain,
String authType) throws CertificateException {
}
public X509Certificate[] getAcceptedIssuers() {
return null;
}
};
sslContext.init(null, new TrustManager[] { tm }, null);
}
#Override
public Socket createSocket(Socket socket, String host, int port,
boolean autoClose) throws IOException, UnknownHostException {
return sslContext.getSocketFactory().createSocket(socket, host,
port, autoClose);
}
#Override
public Socket createSocket() throws IOException {
return sslContext.getSocketFactory().createSocket();
}
I know the url is correct, as are the name value pairs, as I can login via a query string via a browser or via wget:
https://domainname.com/nclogin.submit?f_username=myemail#email.com&f_passwd=password&f_method=LOGIN
This results in a connection established and a redirect to my dashboard page.
The HTML code (source) from the login page can be viewed
here