Just as stored procedures may be written in PL/SQL (Oracle's native language) and then called from PL/SQL, directly, or from Java using JDBC, so too stored procedures may be written in Java and called from PL/SQL or Java.
Before Oracle 10g, calling stored procedures from Java was
package org.glast.pipeline.server.sql.sp; public class SPStream
{
// Package-specific Exception types:
public static final int invalid_stream_ex = -20026;
// ProcessingStatus Enumeration Constants:
public static final String ps_waiting = "WAITING";
public static final String ps_ready = "READY";
public static final String ps_queued = "QUEUED";
public static final String ps_submitted = "SUBMITTED";
public static final String ps_running = "RUNNING";
public static final String ps_success = "SUCCESS";
public static final String ps_failed = "FAILED";
public static final String ps_terminated = "TERMINATED";
public static final String ps_canceled = "CANCELED";
public static final String ps_skipped = "SKIPPED";
// StreamStatus Enumeration Constants:
public static final String ss_waiting = "WAITING";
public static final String ss_queued = "QUEUED";
public static final String ss_running = "RUNNING";
public static final String ss_success = "SUCCESS";
public static final String ss_failed = "FAILED";
public static final String ss_terminated = "TERMINATED";
public static final String ss_canceled = "CANCELED";
public static final String ss_terminating = "TERMINATING";
public static final String ss_canceling = "CANCELING";
private static HashSet processingStates = new HashSet();
static {
processingStates.add(ps_waiting);
processingStates.add(ps_ready);
processingStates.add(ps_queued);
processingStates.add(ps_submitted);
processingStates.add(ps_running);
processingStates.add(ps_success);
processingStates.add(ps_failed);
processingStates.add(ps_terminated);
processingStates.add(ps_canceled);
processingStates.add(ps_terminated);
processingStates.add(ps_skipped);
}
private static HashSet finalProcessingStates = new HashSet();
static {
finalProcessingStates.add(ps_terminated);
finalProcessingStates.add(ps_canceled);
finalProcessingStates.add(ps_success);
finalProcessingStates.add(ps_failed);
finalProcessingStates.add(ps_skipped);
}
private static HashSet streamStates = new HashSet();
static {
streamStates.add(ss_waiting);
streamStates.add(ss_queued);
streamStates.add(ss_running);
streamStates.add(ss_success);
streamStates.add(ss_failed);
streamStates.add(ss_terminating);
streamStates.add(ss_terminated);
streamStates.add(ss_canceling);
streamStates.add(ss_canceled);
}
private static HashSet finalStreamStates = new HashSet();
static {
finalStreamStates.add(ss_terminated);
finalStreamStates.add(ss_canceled);
finalStreamStates.add(ss_success);
finalStreamStates.add(ss_failed);
}
private static boolean allComplete(Map procStatMap, Map streamStatMap) {
for (Iterator i = processingStates.iterator(); i.hasNext();) {
String state = (String)i.next();
int count = ((Integer)procStatMap.get(state)).intValue();
if ( !finalProcessingStates.contains(state) && (count != 0) )
return false;
}
for (Iterator i = streamStates.iterator(); i.hasNext();) {
String state = (String)i.next();
int count = ((Integer)streamStatMap.get(state)).intValue();
if ( !finalStreamStates.contains(state) && (count != 0) )
return false;
}
return true;
}
private static boolean all(String key, Map map) {
int total = 0;
for (Iterator i = map.values().iterator(); i.hasNext();) {
total += ((Integer)i.next()).intValue();
}
return ((Integer)map.get(key)).intValue() == total;
}
private static boolean any(String key, Map map) {
return ((Integer)map.get(key)).intValue() != 0;
}
public static String calculateStreamStatus(int stream) throws ClassNotFoundException {
String retVal = ss_waiting;
Connection connection = null; // Database connection object
ResultSet rset = null;
int parentStream = 0;
try {
// Get a Default Database Connection using Server Side JDBC Driver.
// Note : This class will be loaded on the Database Server and hence use a
// Server Side JDBC Driver to get default Connection to Database
if (System.getProperty("java.vendor").toLowerCase().indexOf("oracle") != -1) {
// we're running as a stored procedure, connect locally:
connection = DriverManager.getConnection("jdbc:default:connection");
} else {
// we're running outside the DB, connect via standard oracle jdbc driver:
Class.forName("oracle.jdbc.driver.OracleDriver");
connection = DriverManager.getConnection("jdbc:oracle:thin:@glast-oracle02.slac.stanford.edu:1521:GLASTDEV","GLAST_DP_TEST","BT33%Q9]MU");
}
//
// Get information about current stream
//
String currentStatus;
PreparedStatement stmt = connection.prepareStatement(
"select * " +
"from Stream " +
"where Stream = ? "
);
stmt.setInt(1,stream);
rset = stmt.executeQuery(); // Execute the query, get Resultset
if (rset.next()) {
currentStatus = rset.getString("STREAMSTATUS");
parentStream = rset.getInt("PARENTSTREAM");
} else {
throw new SQLException("No such stream", "", invalid_stream_ex);
}
stmt.close();
//
// Get a count of the Processes in each state for this Stream:
//
stmt = connection.prepareStatement(
"select ProcessingStatus, count(ProcessingStatus) AS COUNT " +
"from ProcessInstance " +
"where Stream = ? " +
"group by ProcessingStatus "
);
stmt.setInt(1,stream);
rset = stmt.executeQuery(); // Execute the query, get Resultset
Map procStatCounts = new HashMap();
for (Iterator i = processingStates.iterator(); i.hasNext();)
procStatCounts.put((String)i.next(), new Integer(0));
while (rset.next()) {
procStatCounts.put(rset.getString("PROCESSINGSTATUS"), new Integer(rset.getInt("COUNT")));
}
stmt.close();
//
// Get a count of the sub-Streams in each state for this Stream:
//
stmt = connection.prepareStatement(
"select StreamStatus, count(StreamStatus) AS COUNT " +
"from Stream " +
"where ParentStream = ? " +
"group by StreamStatus"
);
stmt.setInt(1, stream);
rset = stmt.executeQuery();
Map subStreamStatCounts = new HashMap();
for (Iterator i = streamStates.iterator(); i.hasNext();)
subStreamStatCounts.put((String)i.next(), new Integer(0));
while (rset.next()) {
subStreamStatCounts.put(rset.getString("STREAMSTATUS"), new Integer(rset.getInt("COUNT")));
}
stmt.close();
if (currentStatus == ss_terminating) {
if (allComplete(procStatCounts, subStreamStatCounts)) {
retVal = ss_terminated;
} else {
retVal = ss_terminating;
}
} else if (currentStatus == ss_canceling) {
if (allComplete(procStatCounts, subStreamStatCounts)) {
retVal = ss_canceled;
} else {
retVal = ss_canceling;
}
} else if ( any(ps_running, procStatCounts) || any(ss_running, subStreamStatCounts) ) {
retVal = ss_running;
} else if ( any(ps_queued, procStatCounts) || any(ps_submitted, procStatCounts) || any(ss_queued, subStreamStatCounts) ) {
retVal = ss_queued;
} else if ( any(ps_waiting, procStatCounts) || any(ss_waiting, subStreamStatCounts) ) {
retVal = ss_waiting;
} else if ( any(ps_failed, procStatCounts) || any(ss_failed, subStreamStatCounts) ) {
retVal = ss_failed;
} else if ( all(ps_success, procStatCounts) && all(ss_success, subStreamStatCounts) ) {
retVal = ss_success;
}
stmt = connection.prepareStatement("update Stream set StreamStatus = ? where Stream = ?");
stmt.setString(1,retVal);
stmt.setInt(2,stream);
stmt.executeUpdate();
if (parentStream != 0)
calculateStreamStatus(parentStream);
} catch (SQLException ex) { // Trap SQL Errors
ex.printStackTrace();
} finally {
try{
if (connection != null || !connection.isClosed())
connection.close(); // Close the database connection
} catch(SQLException ex){
ex.printStackTrace();
}
}
return retVal;
}
}
%ORACLE_HOME%\bin\loadjava -user=GLAST_DP_TEST/BT33%%Q9]MU@glast-oracle02.slac.stanford.edu:1521:GLASTDEV -verbose -force -resolve %project_base%\src\main\java\org\glast\pipeline\server\sql\sp\*.java
set CLASSPATH=%ORACLE_HOME%\sqlj\lib\translator.jar;%ORACLE_HOME%\sqlj\lib\runtime12.jar;%ORACLE_HOME%\jdbc\lib\ojdbc14.jar;%ORACLE_HOME%\sqlj\lib\utl_dbws.jar;%ORACLE_HOME%\jdbc\lib\orai18n.jar;%ORACLE_HOME%\sqlj\runtime12ee.jar;%ORACLE_HOME%\jpub\lib\jpub.jar;%ORACLE_HOME%\sqlj\lib\sqljutl.jar %ORACLE_HOME%\bin\jpub -user=glast_dp_test/BT33%%Q9]MU -url=jdbc:oracle:thin:@glast-oracle02.slac.stanford.edu:1521:GLASTDEV -java=org.glast.pipeline.server.sql.sp.* -package=org.glast.pipeline.server.sql.spclient -compile=false -dir=%project_base%\src\main\java\
package org.glast.pipeline.server.sql.spclient;
public class SPStream
{
public SPStream(java.sql.Connection conn) throws java.sql.SQLException
{ m_ctx = new sqlj.runtime.ref.DefaultContext(conn); }
// MORE GENERATED CODE HERE <clipped> public java.lang.String calculateStreamStatus(int p0)
throws java.lang.ClassNotFoundException
{
Object __jRt_0 = null;
try {
__jRt_0 = oracle.jpub.reflect.Client.invoke(_context(),null, "org.glast.pipeline.server.sql.sp.SPStream","calculateStreamStatus","I",new Object[]{new java.lang.Integer(p0)});
}
catch (java.lang.ClassNotFoundException e) {
throw e;
}
catch (Throwable e) {
e.printStackTrace();
}
return (java.lang.String)__jRt_0;
}
}