MySQL JDBC source analysis fragment and Tomcat's JDBC Pool

Source: Internet
Author: User

The use of Tomcat's JDBC Pooltomcat jdbc pool requires only 2 jar packages, Tomcat-jdbc.jar and Tomcat-juli.jar respectively, the two jar packages can be found in Tomcat7, Tomcat-jdbc.jar in the Tomcat directory, Tomcat-juli.jar in the bin directory. Http://svn.apache.org/viewvc/tomcat/trunk/modules/jdbc-pool/org.apache.tomcat.jdbc.pool Import  Java.sql.Connection;  Import Java.sql.ResultSet;  Import java.sql.Statement;  Import Org.apache.tomcat.jdbc.pool.DataSource;  Import org.apache.tomcat.jdbc.pool.PoolProperties; public class Simplepojoexample {public static void main (string[] args) throws Exception {poolproperties P          = new Poolproperties ();          P.seturl ("Jdbc:mysql://localhost:3306/mysql");          P.setdriverclassname ("Com.mysql.jdbc.Driver");          P.setusername ("root");          P.setpassword ("password");          P.setjmxenabled (TRUE);          P.settestwhileidle (FALSE);          P.settestonborrow (TRUE);          P.setvalidationquery ("SELECT 1");          P.settestonreturn (FALSE);          P.setvalidationinterval (30000); P.settimebEtweenevictionrunsmillis (30000);          P.setmaxactive (100);          P.setinitialsize (10);          P.setmaxwait (10000);          P.setremoveabandonedtimeout (60);          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 DataSource = new DataSource ();          Datasource.setpoolproperties (P);          Connection con = null;            try {con = datasource.getconnection ();            Statement st = Con.createstatement ();            ResultSet rs = st.executequery ("SELECT * from user");            int cnt = 1; while (Rs.next ()) {System.out.println ((cnt++) +). Host: "+rs.getstring (" host ") +" User: "+rs.getstring (" user ") +" Password: "+rs.getstring (" PassworD "));            } rs.close ();          St.close (); } finally {if (con!=null) try {con.close ();} catch (Exception ignore) {}}}}proxyconnectionproxyconnectionpooledconnection con = Idle.poll (); proxyconnection[pooledconnection[null]]00 xx 6c ..... S e l65 (2a), E C T. * . F r4f 4d 5f + 6f O M. T C _ c o64-D e. W H E R E20 4f 5f 49 44. C O D E _ I D3D 1 0 0 5 1 0 0 2 ' 27EscapeProcessorObject escapedsqlresult = Escapeproce Ssor.escapesql (SQL, SERVERSUPPORTSCONVERTFN (), Getmultihostsafeproxy ()); Escapetokenizer Escapetokenizer = new Escapetokenizer (SQL); [49, 48, 48, 53, 49, 48, 48, 50] [39, 49, 48, 48, 53, 49, 48, 48, 50, 39] [39, 49, 48, 48, 53, 49, 48, 48, 50, 39] [[39, 49, 48, 48, 53, 49, 48, 48, 50, 39]] Buffer sendpacket = Fillsendpacket (); Buffer sendpacket = This.connection.getIO (). Getsharedsendpacket ();Position = Mysqlio.header_length;this.results = Executeinternal (This.maxrows, Sendpacket, Createstreamingresultset () , True, Metadatafromcache, false); Buffer Getsharedsendpacket () {if (This.sharedsendpacket = = null) {This.sharedsendpacket = new Buffer (initial_p    Acket_size); } return this.sharedsendpacket;}    Protected Mysqlconnection checkclosed () throws SQLException {mysqlconnection c = this.connection; if (c = = null) {throw sqlerror.createsqlexception (messages.getstring ("statement.49"), sqlerror.sql_state_illegal_a    Rgument, Getexceptioninterceptor ()); } return C;} Public Resultsetinternalmethods Execsql (Statementimpl callingstatement, String sql, int maxRows, Buffer packet, int resul Tsettype, int resultsetconcurrency, Boolean streamresults, String catalog, field[] Cachedmetadata, Boolean isBa TCH) throws SQLException return This.io.sqlQueryDirect (callingstatement, NULL, NULL, packet, maxRows, ResultsetType, resultSetConcurrency, Streamresults, catalog, cachedmetadata); Statementimplbuffer Resultpacket = SendCommand (Mysqldefs.query, NULL, Querypacket, FALSE, NULL, 0);

  

MySQL JDBC source analysis fragment and Tomcat's JDBC Pool

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