List of usage examples for java.sql DatabaseMetaData getMaxConnections
int getMaxConnections() throws SQLException;
From source file:Main.java
public static void main(String[] args) throws Exception { Connection conn = getHSQLConnection(); DatabaseMetaData md = conn.getMetaData(); System.out.println(md.getMaxConnections()); conn.close();/* w ww .j a v a 2 s . com*/ }
From source file:Main.java
public static void main(String[] args) throws Exception { Class.forName(DRIVER);/*from w ww.j av a2s .co m*/ Connection connection = DriverManager.getConnection(URL, USERNAME, PASSWORD); DatabaseMetaData metadata = connection.getMetaData(); int maxConnection = metadata.getMaxConnections(); System.out.println("Maximum Connection = " + maxConnection); connection.close(); }
From source file:Main.java
public static void main(String[] argv) { Connection connection = null; Statement statement;//ww w.j av a 2 s .co m ResultSet rs; try { Context ctx = new InitialContext(); DataSource ds = (DataSource) ctx.lookup("java:comp/env/jdbc/AccountsDB"); connection = ds.getConnection(); DatabaseMetaData md = connection.getMetaData(); statement = connection.createStatement(); System.out.println("getURL() - " + md.getURL()); System.out.println("getUserName() - " + md.getUserName()); System.out.println("getDatabaseProductVersion - " + md.getDatabaseProductVersion()); System.out.println("getDriverMajorVersion - " + md.getDriverMajorVersion()); System.out.println("getDriverMinorVersion - " + md.getDriverMinorVersion()); System.out.println("nullAreSortedHigh - " + md.nullsAreSortedHigh()); System.out.println("<H1>Feature Support</H1>"); System.out.println( "supportsAlterTableWithDropColumn - " + md.supportsAlterTableWithDropColumn() + "<BR>"); System.out.println("supportsBatchUpdates - " + md.supportsBatchUpdates()); System.out.println("supportsTableCorrelationNames - " + md.supportsTableCorrelationNames()); System.out.println("supportsPositionedDelete - " + md.supportsPositionedDelete()); System.out.println("supportsFullOuterJoins - " + md.supportsFullOuterJoins()); System.out.println("supportsStoredProcedures - " + md.supportsStoredProcedures()); System.out.println("supportsMixedCaseQuotedIdentifiers - " + md.supportsMixedCaseQuotedIdentifiers()); System.out.println("supportsANSI92EntryLevelSQL - " + md.supportsANSI92EntryLevelSQL()); System.out.println("supportsCoreSQLGrammar - " + md.supportsCoreSQLGrammar()); System.out.println("getMaxRowSize - " + md.getMaxRowSize()); System.out.println("getMaxStatementLength - " + md.getMaxStatementLength()); System.out.println("getMaxTablesInSelect - " + md.getMaxTablesInSelect()); System.out.println("getMaxConnections - " + md.getMaxConnections()); System.out.println("getMaxCharLiteralLength - " + md.getMaxCharLiteralLength()); System.out.println("getTableTypes()"); rs = md.getTableTypes(); while (rs.next()) { System.out.println(rs.getString(1)); } System.out.println("getTables()"); rs = md.getTables("accounts", "", "%", new String[0]); while (rs.next()) { System.out.println(rs.getString("TABLE_NAME")); } System.out.println("Transaction Support"); System.out.println("getDefaultTransactionIsolation() - " + md.getDefaultTransactionIsolation()); System.out .println("dataDefinitionIgnoredInTransactions() - " + md.dataDefinitionIgnoredInTransactions()); System.out.println("General Source Information"); System.out.println("getMaxTablesInSelect - " + md.getMaxTablesInSelect()); System.out.println("getMaxColumnsInTable - " + md.getMaxColumnsInTable()); System.out.println("getTimeDateFunctions - " + md.getTimeDateFunctions()); System.out.println("supportsCoreSQLGrammar - " + md.supportsCoreSQLGrammar()); System.out.println("getTypeInfo()"); rs = md.getTypeInfo(); while (rs.next()) { System.out.println(rs.getString(1)); } } catch (Exception e) { e.printStackTrace(); } }
From source file:org.focusns.service.env.impl.EnvironmentServiceImpl.java
protected Environment lookupDB() { try {//from w ww. j a v a 2s .c o m DatabaseMetaData metaData = dataSource.getConnection().getMetaData(); // EnvironmentDB envDB = new EnvironmentDB(); envDB.setDatabaseName(metaData.getDatabaseProductName()); envDB.setDatabaseVersion(metaData.getDatabaseProductVersion()); envDB.setDriverName(metaData.getDriverName()); envDB.setDriverVersion(metaData.getDriverVersion()); envDB.setUrl(metaData.getURL()); envDB.setUsername(metaData.getUserName()); envDB.setMaxConnections(metaData.getMaxConnections()); // metaData.getConnection().close(); // return envDB; } catch (SQLException e) { throw new UnsupportedOperationException(e); } }
From source file:DatabaseInfo.java
public void doGet(HttpServletRequest inRequest, HttpServletResponse outResponse) throws ServletException, IOException { PrintWriter out = null;// ww w. j a v a 2 s. c o m Connection connection = null; Statement statement; ResultSet rs; outResponse.setContentType("text/html"); out = outResponse.getWriter(); try { Context ctx = new InitialContext(); DataSource ds = (DataSource) ctx.lookup("java:comp/env/jdbc/AccountsDB"); connection = ds.getConnection(); DatabaseMetaData md = connection.getMetaData(); statement = connection.createStatement(); out.println("<HTML><HEAD><TITLE>Database Server Information</TITLE></HEAD>"); out.println("<BODY>"); out.println("<H1>General Source Information</H1>"); out.println("getURL() - " + md.getURL() + "<BR>"); out.println("getUserName() - " + md.getUserName() + "<BR>"); out.println("getDatabaseProductVersion - " + md.getDatabaseProductVersion() + "<BR>"); out.println("getDriverMajorVersion - " + md.getDriverMajorVersion() + "<BR>"); out.println("getDriverMinorVersion - " + md.getDriverMinorVersion() + "<BR>"); out.println("nullAreSortedHigh - " + md.nullsAreSortedHigh() + "<BR>"); out.println("<H1>Feature Support</H1>"); out.println("supportsAlterTableWithDropColumn - " + md.supportsAlterTableWithDropColumn() + "<BR>"); out.println("supportsBatchUpdates - " + md.supportsBatchUpdates() + "<BR>"); out.println("supportsTableCorrelationNames - " + md.supportsTableCorrelationNames() + "<BR>"); out.println("supportsPositionedDelete - " + md.supportsPositionedDelete() + "<BR>"); out.println("supportsFullOuterJoins - " + md.supportsFullOuterJoins() + "<BR>"); out.println("supportsStoredProcedures - " + md.supportsStoredProcedures() + "<BR>"); out.println("supportsMixedCaseQuotedIdentifiers - " + md.supportsMixedCaseQuotedIdentifiers() + "<BR>"); out.println("supportsANSI92EntryLevelSQL - " + md.supportsANSI92EntryLevelSQL() + "<BR>"); out.println("supportsCoreSQLGrammar - " + md.supportsCoreSQLGrammar() + "<BR>"); out.println("<H1>Data Source Limits</H1>"); out.println("getMaxRowSize - " + md.getMaxRowSize() + "<BR>"); out.println("getMaxStatementLength - " + md.getMaxStatementLength() + "<BR>"); out.println("getMaxTablesInSelect - " + md.getMaxTablesInSelect() + "<BR>"); out.println("getMaxConnections - " + md.getMaxConnections() + "<BR>"); out.println("getMaxCharLiteralLength - " + md.getMaxCharLiteralLength() + "<BR>"); out.println("<H1>SQL Object Available</H1>"); out.println("getTableTypes()<BR><UL>"); rs = md.getTableTypes(); while (rs.next()) { out.println("<LI>" + rs.getString(1)); } out.println("</UL>"); out.println("getTables()<BR><UL>"); rs = md.getTables("accounts", "", "%", new String[0]); while (rs.next()) { out.println("<LI>" + rs.getString("TABLE_NAME")); } out.println("</UL>"); out.println("<H1>Transaction Support</H1>"); out.println("getDefaultTransactionIsolation() - " + md.getDefaultTransactionIsolation() + "<BR>"); out.println( "dataDefinitionIgnoredInTransactions() - " + md.dataDefinitionIgnoredInTransactions() + "<BR>"); out.println("<H1>General Source Information</H1>"); out.println("getMaxTablesInSelect - " + md.getMaxTablesInSelect() + "<BR>"); out.println("getMaxColumnsInTable - " + md.getMaxColumnsInTable() + "<BR>"); out.println("getTimeDateFunctions - " + md.getTimeDateFunctions() + "<BR>"); out.println("supportsCoreSQLGrammar - " + md.supportsCoreSQLGrammar() + "<BR>"); out.println("getTypeInfo()<BR><UL>"); rs = md.getTypeInfo(); while (rs.next()) { out.println("<LI>" + rs.getString(1)); } out.println("</UL>"); out.println("</BODY></HTML>"); } catch (Exception e) { e.printStackTrace(); } }
From source file:org.apache.openjpa.jdbc.sql.DBDictionaryFactory.java
/** * Return a string containing all the property values of the given * database metadata.//w ww. j a v a 2 s . c o m */ public static String toString(DatabaseMetaData meta) throws SQLException { String lineSep = J2DoPrivHelper.getLineSeparator(); StringBuilder buf = new StringBuilder(4096); try { buf.append("catalogSeparator: ").append(meta.getCatalogSeparator()).append(lineSep) .append("catalogTerm: ").append(meta.getCatalogTerm()).append(lineSep) .append("databaseProductName: ").append(meta.getDatabaseProductName()).append(lineSep) .append("databaseProductVersion: ").append(meta.getDatabaseProductVersion()).append(lineSep) .append("driverName: ").append(meta.getDriverName()).append(lineSep).append("driverVersion: ") .append(meta.getDriverVersion()).append(lineSep).append("extraNameCharacters: ") .append(meta.getExtraNameCharacters()).append(lineSep).append("identifierQuoteString: ") .append(meta.getIdentifierQuoteString()).append(lineSep).append("numericFunctions: ") .append(meta.getNumericFunctions()).append(lineSep).append("procedureTerm: ") .append(meta.getProcedureTerm()).append(lineSep).append("schemaTerm: ") .append(meta.getSchemaTerm()).append(lineSep).append("searchStringEscape: ") .append(meta.getSearchStringEscape()).append(lineSep).append("sqlKeywords: ") .append(meta.getSQLKeywords()).append(lineSep).append("stringFunctions: ") .append(meta.getStringFunctions()).append(lineSep).append("systemFunctions: ") .append(meta.getSystemFunctions()).append(lineSep).append("timeDateFunctions: ") .append(meta.getTimeDateFunctions()).append(lineSep).append("url: ").append(meta.getURL()) .append(lineSep).append("userName: ").append(meta.getUserName()).append(lineSep) .append("defaultTransactionIsolation: ").append(meta.getDefaultTransactionIsolation()) .append(lineSep).append("driverMajorVersion: ").append(meta.getDriverMajorVersion()) .append(lineSep).append("driverMinorVersion: ").append(meta.getDriverMinorVersion()) .append(lineSep).append("maxBinaryLiteralLength: ").append(meta.getMaxBinaryLiteralLength()) .append(lineSep).append("maxCatalogNameLength: ").append(meta.getMaxCatalogNameLength()) .append(lineSep).append("maxCharLiteralLength: ").append(meta.getMaxCharLiteralLength()) .append(lineSep).append("maxColumnNameLength: ").append(meta.getMaxColumnNameLength()) .append(lineSep).append("maxColumnsInGroupBy: ").append(meta.getMaxColumnsInGroupBy()) .append(lineSep).append("maxColumnsInIndex: ").append(meta.getMaxColumnsInIndex()) .append(lineSep).append("maxColumnsInOrderBy: ").append(meta.getMaxColumnsInOrderBy()) .append(lineSep).append("maxColumnsInSelect: ").append(meta.getMaxColumnsInSelect()) .append(lineSep).append("maxColumnsInTable: ").append(meta.getMaxColumnsInTable()) .append(lineSep).append("maxConnections: ").append(meta.getMaxConnections()).append(lineSep) .append("maxCursorNameLength: ").append(meta.getMaxCursorNameLength()).append(lineSep) .append("maxIndexLength: ").append(meta.getMaxIndexLength()).append(lineSep) .append("maxProcedureNameLength: ").append(meta.getMaxProcedureNameLength()).append(lineSep) .append("maxRowSize: ").append(meta.getMaxRowSize()).append(lineSep) .append("maxSchemaNameLength: ").append(meta.getMaxSchemaNameLength()).append(lineSep) .append("maxStatementLength: ").append(meta.getMaxStatementLength()).append(lineSep) .append("maxStatements: ").append(meta.getMaxStatements()).append(lineSep) .append("maxTableNameLength: ").append(meta.getMaxTableNameLength()).append(lineSep) .append("maxTablesInSelect: ").append(meta.getMaxTablesInSelect()).append(lineSep) .append("maxUserNameLength: ").append(meta.getMaxUserNameLength()).append(lineSep) .append("isCatalogAtStart: ").append(meta.isCatalogAtStart()).append(lineSep) .append("isReadOnly: ").append(meta.isReadOnly()).append(lineSep) .append("nullPlusNonNullIsNull: ").append(meta.nullPlusNonNullIsNull()).append(lineSep) .append("nullsAreSortedAtEnd: ").append(meta.nullsAreSortedAtEnd()).append(lineSep) .append("nullsAreSortedAtStart: ").append(meta.nullsAreSortedAtStart()).append(lineSep) .append("nullsAreSortedHigh: ").append(meta.nullsAreSortedHigh()).append(lineSep) .append("nullsAreSortedLow: ").append(meta.nullsAreSortedLow()).append(lineSep) .append("storesLowerCaseIdentifiers: ").append(meta.storesLowerCaseIdentifiers()) .append(lineSep).append("storesLowerCaseQuotedIdentifiers: ") .append(meta.storesLowerCaseQuotedIdentifiers()).append(lineSep) .append("storesMixedCaseIdentifiers: ").append(meta.storesMixedCaseIdentifiers()) .append(lineSep).append("storesMixedCaseQuotedIdentifiers: ") .append(meta.storesMixedCaseQuotedIdentifiers()).append(lineSep) .append("storesUpperCaseIdentifiers: ").append(meta.storesUpperCaseIdentifiers()) .append(lineSep).append("storesUpperCaseQuotedIdentifiers: ") .append(meta.storesUpperCaseQuotedIdentifiers()).append(lineSep) .append("supportsAlterTableWithAddColumn: ").append(meta.supportsAlterTableWithAddColumn()) .append(lineSep).append("supportsAlterTableWithDropColumn: ") .append(meta.supportsAlterTableWithDropColumn()).append(lineSep) .append("supportsANSI92EntryLevelSQL: ").append(meta.supportsANSI92EntryLevelSQL()) .append(lineSep).append("supportsANSI92FullSQL: ").append(meta.supportsANSI92FullSQL()) .append(lineSep).append("supportsANSI92IntermediateSQL: ") .append(meta.supportsANSI92IntermediateSQL()).append(lineSep) .append("supportsCatalogsInDataManipulation: ") .append(meta.supportsCatalogsInDataManipulation()).append(lineSep) .append("supportsCatalogsInIndexDefinitions: ") .append(meta.supportsCatalogsInIndexDefinitions()).append(lineSep) .append("supportsCatalogsInPrivilegeDefinitions: ") .append(meta.supportsCatalogsInPrivilegeDefinitions()).append(lineSep) .append("supportsCatalogsInProcedureCalls: ").append(meta.supportsCatalogsInProcedureCalls()) .append(lineSep).append("supportsCatalogsInTableDefinitions: ") .append(meta.supportsCatalogsInTableDefinitions()).append(lineSep) .append("supportsColumnAliasing: ").append(meta.supportsColumnAliasing()).append(lineSep) .append("supportsConvert: ").append(meta.supportsConvert()).append(lineSep) .append("supportsCoreSQLGrammar: ").append(meta.supportsCoreSQLGrammar()).append(lineSep) .append("supportsCorrelatedSubqueries: ").append(meta.supportsCorrelatedSubqueries()) .append(lineSep).append("supportsDataDefinitionAndDataManipulationTransactions: ") .append(meta.supportsDataDefinitionAndDataManipulationTransactions()).append(lineSep) .append("supportsDataManipulationTransactionsOnly: ") .append(meta.supportsDataManipulationTransactionsOnly()).append(lineSep) .append("supportsDifferentTableCorrelationNames: ") .append(meta.supportsDifferentTableCorrelationNames()).append(lineSep) .append("supportsExpressionsInOrderBy: ").append(meta.supportsExpressionsInOrderBy()) .append(lineSep).append("supportsExtendedSQLGrammar: ") .append(meta.supportsExtendedSQLGrammar()).append(lineSep).append("supportsFullOuterJoins: ") .append(meta.supportsFullOuterJoins()).append(lineSep).append("supportsGroupBy: ") .append(meta.supportsGroupBy()).append(lineSep).append("supportsGroupByBeyondSelect: ") .append(meta.supportsGroupByBeyondSelect()).append(lineSep).append("supportsGroupByUnrelated: ") .append(meta.supportsGroupByUnrelated()).append(lineSep) .append("supportsIntegrityEnhancementFacility: ") .append(meta.supportsIntegrityEnhancementFacility()).append(lineSep) .append("supportsLikeEscapeClause: ").append(meta.supportsLikeEscapeClause()).append(lineSep) .append("supportsLimitedOuterJoins: ").append(meta.supportsLimitedOuterJoins()).append(lineSep) .append("supportsMinimumSQLGrammar: ").append(meta.supportsMinimumSQLGrammar()).append(lineSep) .append("supportsMixedCaseIdentifiers: ").append(meta.supportsMixedCaseIdentifiers()) .append(lineSep).append("supportsMixedCaseQuotedIdentifiers: ") .append(meta.supportsMixedCaseQuotedIdentifiers()).append(lineSep) .append("supportsMultipleResultSets: ").append(meta.supportsMultipleResultSets()) .append(lineSep).append("supportsMultipleTransactions: ") .append(meta.supportsMultipleTransactions()).append(lineSep) .append("supportsNonNullableColumns: ").append(meta.supportsNonNullableColumns()) .append(lineSep).append("supportsOpenCursorsAcrossCommit: ") .append(meta.supportsOpenCursorsAcrossCommit()).append(lineSep) .append("supportsOpenCursorsAcrossRollback: ").append(meta.supportsOpenCursorsAcrossRollback()) .append(lineSep).append("supportsOpenStatementsAcrossCommit: ") .append(meta.supportsOpenStatementsAcrossCommit()).append(lineSep) .append("supportsOpenStatementsAcrossRollback: ") .append(meta.supportsOpenStatementsAcrossRollback()).append(lineSep) .append("supportsOrderByUnrelated: ").append(meta.supportsOrderByUnrelated()).append(lineSep) .append("supportsOuterJoins: ").append(meta.supportsOuterJoins()).append(lineSep) .append("supportsPositionedDelete: ").append(meta.supportsPositionedDelete()).append(lineSep) .append("supportsPositionedUpdate: ").append(meta.supportsPositionedUpdate()).append(lineSep) .append("supportsSchemasInDataManipulation: ").append(meta.supportsSchemasInDataManipulation()) .append(lineSep).append("supportsSchemasInIndexDefinitions: ") .append(meta.supportsSchemasInIndexDefinitions()).append(lineSep) .append("supportsSchemasInPrivilegeDefinitions: ") .append(meta.supportsSchemasInPrivilegeDefinitions()).append(lineSep) .append("supportsSchemasInProcedureCalls: ").append(meta.supportsSchemasInProcedureCalls()) .append(lineSep).append("supportsSchemasInTableDefinitions: ") .append(meta.supportsSchemasInTableDefinitions()).append(lineSep) .append("supportsSelectForUpdate: ").append(meta.supportsSelectForUpdate()).append(lineSep) .append("supportsStoredProcedures: ").append(meta.supportsStoredProcedures()).append(lineSep) .append("supportsSubqueriesInComparisons: ").append(meta.supportsSubqueriesInComparisons()) .append(lineSep).append("supportsSubqueriesInExists: ") .append(meta.supportsSubqueriesInExists()).append(lineSep).append("supportsSubqueriesInIns: ") .append(meta.supportsSubqueriesInIns()).append(lineSep) .append("supportsSubqueriesInQuantifieds: ").append(meta.supportsSubqueriesInQuantifieds()) .append(lineSep).append("supportsTableCorrelationNames: ") .append(meta.supportsTableCorrelationNames()).append(lineSep).append("supportsTransactions: ") .append(meta.supportsTransactions()).append(lineSep).append("supportsUnion: ") .append(meta.supportsUnion()).append(lineSep).append("supportsUnionAll: ") .append(meta.supportsUnionAll()).append(lineSep).append("usesLocalFilePerTable: ") .append(meta.usesLocalFilePerTable()).append(lineSep).append("usesLocalFiles: ") .append(meta.usesLocalFiles()).append(lineSep).append("allProceduresAreCallable: ") .append(meta.allProceduresAreCallable()).append(lineSep).append("allTablesAreSelectable: ") .append(meta.allTablesAreSelectable()).append(lineSep) .append("dataDefinitionCausesTransactionCommit: ") .append(meta.dataDefinitionCausesTransactionCommit()).append(lineSep) .append("dataDefinitionIgnoredInTransactions: ") .append(meta.dataDefinitionIgnoredInTransactions()).append(lineSep) .append("doesMaxRowSizeIncludeBlobs: ").append(meta.doesMaxRowSizeIncludeBlobs()) .append(lineSep).append("supportsBatchUpdates: ").append(meta.supportsBatchUpdates()); } catch (Throwable t) { // maybe abstract method error for jdbc 3 metadata method, or // other error buf.append(lineSep).append("Caught throwable: ").append(t); } return buf.toString(); }