Exemple #1
0
 static void genclass(DelegatorGenerator dg, Class intfcl, String fqcn, File srcroot)
     throws IOException {
   File genDir = new File(srcroot, dirForFqcn(fqcn));
   if (!genDir.exists()) {
     System.err.println(
         JdbcProxyGenerator.class.getName()
             + " -- creating directory: "
             + genDir.getAbsolutePath());
     genDir.mkdirs();
   }
   String fileName = CodegenUtils.fqcnLastElement(fqcn) + ".java";
   Writer w = null;
   try {
     w = new BufferedWriter(new FileWriter(new File(genDir, fileName)));
     dg.writeDelegator(intfcl, fqcn, w);
     w.flush();
     System.err.println("Generated " + fileName);
   } finally {
     try {
       if (w != null) w.close();
     } catch (Exception e) {
       e.printStackTrace();
     }
   }
 }
Exemple #2
0
 protected void generateExtraDeclarations(Class intfcl, String genclass, IndentedWriter iw)
     throws IOException {
   super.generateExtraDeclarations(intfcl, genclass, iw);
   iw.println();
   iw.println("NewProxyConnection proxyCon;");
   iw.println();
   iw.print(CodegenUtils.fqcnLastElement(genclass));
   iw.println(
       "( "
           + CodegenUtils.simpleClassName(intfcl)
           + " inner, NewPooledConnection parentPooledConnection, NewProxyConnection proxyCon )");
   iw.println("{");
   iw.upIndent();
   iw.println("this( inner, parentPooledConnection );");
   iw.println("this.proxyCon = proxyCon;");
   iw.downIndent();
   iw.println("}");
 }
Exemple #3
0
    void generateFindMethodAndArgs(Method method, IndentedWriter iw) throws IOException {
      iw.println("Class[] argTypes = ");
      iw.println("{");
      iw.upIndent();

      Class[] argTypes = method.getParameterTypes();
      for (int i = 0, len = argTypes.length; i < len; ++i) {
        if (i != 0) iw.println(",");
        iw.print(CodegenUtils.simpleClassName(argTypes[i]) + ".class");
      }
      iw.println();
      iw.downIndent();
      iw.println("};");
      iw.println(
          "Method method = Connection.class.getMethod( \042"
              + method.getName()
              + "\042 , argTypes );");
      iw.println();
      iw.println("Object[] args = ");
      iw.println("{");
      iw.upIndent();

      for (int i = 0, len = argTypes.length; i < len; ++i) {
        if (i != 0) iw.println(",");
        String argName = CodegenUtils.generatedArgumentName(i);
        Class argType = argTypes[i];
        if (argType.isPrimitive()) {
          if (argType == boolean.class) iw.print("Boolean.valueOf( " + argName + " )");
          else if (argType == byte.class) iw.print("new Byte( " + argName + " )");
          else if (argType == char.class) iw.print("new Character( " + argName + " )");
          else if (argType == short.class) iw.print("new Short( " + argName + " )");
          else if (argType == int.class) iw.print("new Integer( " + argName + " )");
          else if (argType == long.class) iw.print("new Long( " + argName + " )");
          else if (argType == float.class) iw.print("new Float( " + argName + " )");
          else if (argType == double.class) iw.print("new Double( " + argName + " )");
        } else iw.print(argName);
      }

      iw.downIndent();
      iw.println("};");
    }
Exemple #4
0
 protected void generateExtraDeclarations(Class intfcl, String genclass, IndentedWriter iw)
     throws IOException {
   super.generateExtraDeclarations(intfcl, genclass, iw);
   iw.println();
   iw.println("Object creator;");
   iw.println("Object creatorProxy;");
   iw.println("NewProxyConnection proxyConn;");
   iw.println();
   iw.print(CodegenUtils.fqcnLastElement(genclass));
   iw.println(
       "( "
           + CodegenUtils.simpleClassName(intfcl)
           + " inner, NewPooledConnection parentPooledConnection, Object c, Object cProxy )");
   iw.println("{");
   iw.upIndent();
   iw.println("this( inner, parentPooledConnection );");
   iw.println("this.creator      = c;");
   iw.println("this.creatorProxy = cProxy;");
   iw.println(
       "if (creatorProxy instanceof NewProxyConnection) this.proxyConn = (NewProxyConnection) cProxy;");
   iw.downIndent();
   iw.println("}");
 }
Exemple #5
0
    protected void generateDelegateCode(
        Class intfcl, String genclass, Method method, IndentedWriter iw) throws IOException {
      String mname = method.getName();
      if (jdbc4WrapperMethod(mname)) {
        generateWrapperDelegateCode(intfcl, genclass, method, iw);
        return;
      }

      Class retType = method.getReturnType();

      if (ResultSet.class.isAssignableFrom(retType)) {
        iw.println("ResultSet innerResultSet = inner." + CodegenUtils.methodCall(method) + ";");
        iw.println("if (innerResultSet == null) return null;");
        iw.println(
            "return new NewProxyResultSet( innerResultSet, parentPooledConnection, inner, this );");
      } else if (mname.equals("getConnection")) {
        iw.println("return this.proxyCon;");
      } else super.generateDelegateCode(intfcl, genclass, method, iw);
    }
Exemple #6
0
  protected void generateExtraDeclarations(Class intfcl, String genclass, IndentedWriter iw)
      throws IOException {
    // premature-detach-debug-debug only!
    if (PREMATURE_DETACH_DEBUG) {
      iw.println("com.mchange.v2.debug.ThreadNameStackTraceRecorder prematureDetachRecorder");
      iw.upIndent();
      iw.println(
          "= new com.mchange.v2.debug.ThreadNameStackTraceRecorder(\042Premature Detach Recorder\042);");
      iw.downIndent();
    }
    // end-premature-detach-debug-only!

    iw.println("private final static MLogger logger = MLog.getLogger( \042" + genclass + "\042 );");
    iw.println();

    iw.println("volatile NewPooledConnection parentPooledConnection;");
    iw.println();

    iw.println("ConnectionEventListener cel = new ConnectionEventListener()");
    iw.println("{");
    iw.upIndent();

    iw.println("public void connectionErrorOccurred(ConnectionEvent evt)");
    iw.println(
        "{ /* DON'T detach()... IGNORE -- this could be an ordinary error. Leave it to the PooledConnection to test, but leave proxies intact */ }");
    // BAD puppy -- iw.println("{ detach(); }");

    iw.println();
    iw.println("public void connectionClosed(ConnectionEvent evt)");
    iw.println("{ detach(); }");

    iw.downIndent();
    iw.println("};");
    iw.println();

    iw.println("void attach( NewPooledConnection parentPooledConnection )");
    iw.println("{");
    iw.upIndent();
    // iw.println("System.err.println( \"attach( \" +  parentPooledConnection + \" )\" );");
    iw.println("this.parentPooledConnection = parentPooledConnection;");
    iw.println("parentPooledConnection.addConnectionEventListener( cel );");
    iw.downIndent();
    iw.println("}");
    iw.println();
    iw.println("private void detach()");
    iw.println("{");
    iw.upIndent();

    // factored out so we could define debug versions...
    writeDetachBody(iw);

    iw.downIndent();
    iw.println("}");
    iw.println();
    iw.print(CodegenUtils.fqcnLastElement(genclass));
    iw.println(
        "( "
            + CodegenUtils.simpleClassName(intfcl)
            + " inner, NewPooledConnection parentPooledConnection )");
    iw.println("{");
    iw.upIndent();
    iw.println("this( inner );");
    iw.println("attach( parentPooledConnection );");
    generateExtraConstructorCode(intfcl, genclass, iw);
    iw.downIndent();
    iw.println("}");
    iw.println();
    iw.println("boolean isDetached()");
    iw.println("{ return (this.parentPooledConnection == null); }");
    iw.println();
    iw.println(
        "public String toString() { return super.toString() + \042 [wrapping: \042 + inner + \042]\042; }");

    /*

    // Support JDBC4 Wrapper interface
    String wrappedLiteral = intfcl.getName() + ".class";
    iw.println();
    iw.println("public boolean isWrapperFor(Class<?> iface) throws SQLException");
    iw.println("{");
    iw.upIndent();
    iw.println("return ( " + wrappedLiteral + "== iface || " + wrappedLiteral + ".isAssignableFrom( iface ) );" );
    iw.downIndent();
    iw.println("}");
    iw.println();
    iw.println("public <T> T unwrap(Class<T> iface) throws SQLException");
    iw.println("{");
    iw.upIndent();
    iw.println("if (this.isWrapperFor( iface )) return inner;");
    iw.println("else throw new SQLException( this + \042 is not a wrapper for \042 + iface.getName());");
    iw.downIndent();
    iw.println("}");

    */

    iw.println();
    generateIsWrapperHelperMethods(intfcl, iw);
  }
Exemple #7
0
    protected void generateDelegateCode(
        Class intfcl, String genclass, Method method, IndentedWriter iw) throws IOException {
      String mname = method.getName();
      if (jdbc4WrapperMethod(mname)) {
        generateWrapperDelegateCode(intfcl, genclass, method, iw);
        return;
      }

      if (mname.equals("createStatement")) {
        iw.println("txn_known_resolved = false;");
        iw.println();
        iw.println("Statement innerStmt = inner." + CodegenUtils.methodCall(method) + ";");
        iw.println("parentPooledConnection.markActiveUncachedStatement( innerStmt );");
        iw.println(
            "return new NewProxyStatement( innerStmt, parentPooledConnection, false, this );");
      } else if (mname.equals("prepareStatement")) {
        iw.println("txn_known_resolved = false;");
        iw.println();
        iw.println("PreparedStatement innerStmt;");
        iw.println();
        iw.println("if ( parentPooledConnection.isStatementCaching() )");
        iw.println("{");
        iw.upIndent();

        iw.println("try");
        iw.println("{");
        iw.upIndent();

        generateFindMethodAndArgs(method, iw);
        iw.println(
            "innerStmt = (PreparedStatement) parentPooledConnection.checkoutStatement( method, args );");
        iw.println(
            "return new NewProxyPreparedStatement( innerStmt, parentPooledConnection, true, this );");

        iw.downIndent();
        iw.println("}");
        iw.println("catch (ResourceClosedException e)");
        iw.println("{");
        iw.upIndent();

        iw.println("if ( logger.isLoggable( MLevel.FINE ) )");
        iw.upIndent();
        iw.println(
            "logger.log( MLevel.FINE, "
                + "\042A Connection tried to prepare a Statement via a Statement cache that is already closed. "
                + "This can happen -- rarely -- if a DataSource is closed or reset() while Connections are checked-out and in use.\042, e );");
        iw.downIndent();

        // repeated code... any changes probably need to be duplicated below
        iw.println("innerStmt = inner." + CodegenUtils.methodCall(method) + ";");
        iw.println("parentPooledConnection.markActiveUncachedStatement( innerStmt );");
        iw.println(
            "return new NewProxyPreparedStatement( innerStmt, parentPooledConnection, false, this );");

        iw.downIndent();
        iw.println("}");

        iw.downIndent();
        iw.println("}");
        iw.println("else");
        iw.println("{");
        iw.upIndent();

        // repeated code... any changes probably need to be duplicated above
        iw.println("innerStmt = inner." + CodegenUtils.methodCall(method) + ";");
        iw.println("parentPooledConnection.markActiveUncachedStatement( innerStmt );");
        iw.println(
            "return new NewProxyPreparedStatement( innerStmt, parentPooledConnection, false, this );");

        iw.downIndent();
        iw.println("}");

      } else if (mname.equals("prepareCall")) {
        iw.println("txn_known_resolved = false;");
        iw.println();
        iw.println("CallableStatement innerStmt;");
        iw.println();
        iw.println("if ( parentPooledConnection.isStatementCaching() )");
        iw.println("{");
        iw.upIndent();

        iw.println("try");
        iw.println("{");
        iw.upIndent();

        generateFindMethodAndArgs(method, iw);
        iw.println(
            "innerStmt = (CallableStatement) parentPooledConnection.checkoutStatement( method, args );");
        iw.println(
            "return new NewProxyCallableStatement( innerStmt, parentPooledConnection, true, this );");

        iw.downIndent();
        iw.println("}");
        iw.println("catch (ResourceClosedException e)");
        iw.println("{");
        iw.upIndent();

        iw.println("if ( logger.isLoggable( MLevel.FINE ) )");
        iw.upIndent();
        iw.println(
            "logger.log( MLevel.FINE, "
                + "\042A Connection tried to prepare a CallableStatement via a Statement cache that is already closed. "
                + "This can happen -- rarely -- if a DataSource is closed or reset() while Connections are checked-out and in use.\042, e );");
        iw.downIndent();

        // repeated code... any changes probably need to be duplicated below
        iw.println("innerStmt = inner." + CodegenUtils.methodCall(method) + ";");
        iw.println("parentPooledConnection.markActiveUncachedStatement( innerStmt );");
        iw.println(
            "return new NewProxyCallableStatement( innerStmt, parentPooledConnection, false, this );");

        iw.downIndent();
        iw.println("}");

        iw.downIndent();
        iw.println("}");
        iw.println("else");
        iw.println("{");
        iw.upIndent();

        // repeated code... any changes probably need to be duplicated above
        iw.println("innerStmt = inner." + CodegenUtils.methodCall(method) + ";");
        iw.println("parentPooledConnection.markActiveUncachedStatement( innerStmt );");
        iw.println(
            "return new NewProxyCallableStatement( innerStmt, parentPooledConnection, false, this );");

        iw.downIndent();
        iw.println("}");

      } else if (mname.equals("getMetaData")) {
        iw.println("txn_known_resolved = false;");
        iw.println();
        iw.println("if (this.metaData == null)");
        iw.println("{");
        iw.upIndent();
        iw.println(
            "DatabaseMetaData innerMetaData = inner." + CodegenUtils.methodCall(method) + ";");
        iw.println(
            "this.metaData = new NewProxyDatabaseMetaData( innerMetaData, parentPooledConnection, this );");
        iw.downIndent();
        iw.println("}");
        iw.println("return this.metaData;");
      } else if (mname.equals("setTransactionIsolation")) {
        // do nothing with txn_known_resolved

        super.generateDelegateCode(intfcl, genclass, method, iw);
        iw.println(
            "parentPooledConnection.markNewTxnIsolation( "
                + CodegenUtils.generatedArgumentName(0)
                + " );");
      } else if (mname.equals("setCatalog")) {
        // do nothing with txn_known_resolved

        super.generateDelegateCode(intfcl, genclass, method, iw);
        iw.println(
            "parentPooledConnection.markNewCatalog( "
                + CodegenUtils.generatedArgumentName(0)
                + " );");
      } else if (mname.equals("setHoldability")) {
        // do nothing with txn_known_resolved

        super.generateDelegateCode(intfcl, genclass, method, iw);
        iw.println(
            "parentPooledConnection.markNewHoldability( "
                + CodegenUtils.generatedArgumentName(0)
                + " );");
      } else if (mname.equals("setReadOnly")) {
        // do nothing with txn_known_resolved

        super.generateDelegateCode(intfcl, genclass, method, iw);
        iw.println(
            "parentPooledConnection.markNewReadOnly( "
                + CodegenUtils.generatedArgumentName(0)
                + " );");
      } else if (mname.equals("setTypeMap")) {
        // do nothing with txn_known_resolved

        super.generateDelegateCode(intfcl, genclass, method, iw);
        iw.println(
            "parentPooledConnection.markNewTypeMap( "
                + CodegenUtils.generatedArgumentName(0)
                + " );");
      } else if (mname.equals("getWarnings") || mname.equals("clearWarnings")) {
        // do nothing with txn_known_resolved

        super.generateDelegateCode(intfcl, genclass, method, iw);
      } else if (mname.equals("close")) {
        iw.println("if (! this.isDetached())");
        iw.println("{");
        iw.upIndent();
        iw.println("NewPooledConnection npc = parentPooledConnection;");
        iw.println("this.detach();");
        iw.println("npc.markClosedProxyConnection( this, txn_known_resolved );");
        iw.println("this.inner = null;");
        iw.downIndent();
        iw.println("}");
        iw.println("else if (Debug.DEBUG && logger.isLoggable( MLevel.FINE ))");
        iw.println("{");
        iw.upIndent();
        iw.println("logger.log( MLevel.FINE, this + \042: close() called more than once.\042 );");

        // premature-detach-debug-debug only!
        if (PREMATURE_DETACH_DEBUG) {
          iw.println("prematureDetachRecorder.record();");
          iw.println(
              "logger.warning( prematureDetachRecorder.getDump(\042Apparent multiple close of "
                  + getInnerTypeName()
                  + ".\042) );");
        }
        // end-premature-detach-debug-only!

        iw.downIndent();
        iw.println("}");
      } else if (mname.equals("isClosed")) {
        iw.println("return this.isDetached();");
      } else if (mname.equals("isValid")) {
        iw.println("if (this.isDetached()) return false;");

        super.generateDelegateCode(intfcl, genclass, method, iw);
      } else {
        boolean known_resolved =
            (mname.equals("commit") || mname.equals("rollback") || mname.equals("setAutoCommit"));

        if (!known_resolved) {
          iw.println("txn_known_resolved = false;");
          iw.println();
        }
        super.generateDelegateCode(intfcl, genclass, method, iw);
        if (known_resolved) {
          iw.println();
          iw.println("txn_known_resolved = true;");
        }
      }
    }
Exemple #8
0
    protected void generateExtraDeclarations(Class intfcl, String genclass, IndentedWriter iw)
        throws IOException {
      super.generateExtraDeclarations(intfcl, genclass, iw);
      iw.println();

      // concurrent-access-debug only!
      if (CONCURRENT_ACCESS_DEBUG) {
        iw.println("com.mchange.v2.debug.ThreadNameStackTraceRecorder concurrentAccessRecorder");
        iw.upIndent();
        iw.println(
            "= new com.mchange.v2.debug.ThreadNameStackTraceRecorder(\042Concurrent Access Recorder\042);");
        iw.downIndent();
      }
      // end concurrent-access-debug only!

      iw.println("boolean is_cached;");
      iw.println("NewProxyConnection creatorProxy;");
      iw.println();
      iw.println("// Although formally unnecessary, we sync access to myProxyResultSets on");
      iw.println("// that set's own lock, in case clients (illegally but not uncommonly) close()");
      iw.println("// the Statement from a Thread other than the one they use in general");
      iw.println("// with the Statement");
      iw.println("HashSet myProxyResultSets = new HashSet();");
      iw.println();
      iw.println("public void detachProxyResultSet( ResultSet prs )");
      iw.println("{");
      iw.upIndent();
      // iw.println("System.err.println(\042detachProxyResultSet\042);");
      iw.println("synchronized (myProxyResultSets) { myProxyResultSets.remove( prs ); }");
      iw.downIndent();
      iw.println("}");
      iw.println();
      iw.print(CodegenUtils.fqcnLastElement(genclass));
      iw.println(
          "( "
              + CodegenUtils.simpleClassName(intfcl)
              + " inner, NewPooledConnection parentPooledConnection, boolean cached, NewProxyConnection cProxy )");
      iw.println("{");
      iw.upIndent();
      iw.println("this( inner, parentPooledConnection );");
      iw.println("this.is_cached = cached;");
      iw.println("this.creatorProxy = cProxy;");
      iw.downIndent();
      iw.println("}");
      iw.println();
      iw.println(
          "public Object rawStatementOperation(Method m, Object target, Object[] args) "
              + "throws IllegalAccessException, InvocationTargetException, SQLException");
      iw.println("{");
      iw.upIndent();
      iw.println("maybeDirtyTransaction();");
      iw.println();
      iw.println("if (target == C3P0ProxyStatement.RAW_STATEMENT) target = inner;");
      iw.println("for (int i = 0, len = args.length; i < len; ++i)");
      iw.upIndent();
      iw.println("if (args[i] == C3P0ProxyStatement.RAW_STATEMENT) args[i] = inner;");
      iw.downIndent();
      iw.println("Object out = m.invoke(target, args);");
      iw.println("if (out instanceof ResultSet)");
      iw.println("{");
      iw.upIndent();
      iw.println("ResultSet innerResultSet = (ResultSet) out;");
      iw.println(
          "parentPooledConnection.markActiveResultSetForStatement( inner, innerResultSet );");
      iw.println(
          "out = new NewProxyResultSet( innerResultSet, parentPooledConnection, inner, this );");
      iw.downIndent();
      iw.println("}");
      iw.println();
      iw.println("return out;");
      iw.downIndent();
      iw.println("}");
      iw.println();
      iw.println("void maybeDirtyTransaction()");
      iw.println("{ if (creatorProxy != null) creatorProxy.maybeDirtyTransaction(); }");
    }
Exemple #9
0
    protected void generateDelegateCode(
        Class intfcl, String genclass, Method method, IndentedWriter iw) throws IOException {

      String mname = method.getName();
      if (jdbc4WrapperMethod(mname)) {
        generateWrapperDelegateCode(intfcl, genclass, method, iw);
        return;
      }

      Class retType = method.getReturnType();

      iw.println("maybeDirtyTransaction();");
      iw.println();

      if (ResultSet.class.isAssignableFrom(retType)) {
        iw.println("ResultSet innerResultSet = inner." + CodegenUtils.methodCall(method) + ";");
        iw.println("if (innerResultSet == null) return null;");
        iw.println(
            "parentPooledConnection.markActiveResultSetForStatement( inner, innerResultSet );");
        iw.println(
            "NewProxyResultSet out = new NewProxyResultSet( innerResultSet, parentPooledConnection, inner, this );");
        iw.println("synchronized ( myProxyResultSets ) { myProxyResultSets.add( out ); }");
        iw.println("return out;");
      } else if (mname.equals("getConnection")) {
        iw.println("if (! this.isDetached())");
        iw.upIndent();
        iw.println("return creatorProxy;");
        iw.downIndent();
        iw.println("else");
        iw.upIndent();
        iw.println("throw new SQLException(\"You cannot operate on a closed Statement!\");");
        iw.downIndent();
      } else if (mname.equals("close")) {
        iw.println("if (! this.isDetached())");
        iw.println("{");
        iw.upIndent();
        // iw.println("System.err.println(\042Closing proxy Statement: \042 + this);");
        iw.println("synchronized ( myProxyResultSets )");
        iw.println("{");
        iw.upIndent();
        iw.println("for( Iterator ii = myProxyResultSets.iterator(); ii.hasNext(); )");
        iw.println("{");
        iw.upIndent();
        iw.println("ResultSet closeMe = (ResultSet) ii.next();");
        iw.println("ii.remove();");
        iw.println();
        iw.println("try { closeMe.close(); }");
        iw.println("catch (SQLException e)");
        iw.println("{");
        iw.upIndent();
        iw.println("if (logger.isLoggable( MLevel.WARNING ))");
        iw.upIndent();
        iw.println(
            "logger.log( MLevel.WARNING, \042Exception on close of apparently orphaned ResultSet.\042, e);");
        iw.downIndent();
        iw.downIndent();
        iw.println("}");
        iw.println("if (logger.isLoggable( MLevel.FINE ))");
        iw.upIndent();
        iw.println(
            "logger.log( MLevel.FINE, this + \042 closed orphaned ResultSet: \042 +closeMe);");
        iw.downIndent();
        iw.downIndent();
        iw.println("}");
        iw.downIndent();
        iw.println("}");
        iw.println();
        iw.println("if ( is_cached )");
        iw.upIndent();
        iw.println("parentPooledConnection.checkinStatement( inner );");
        iw.downIndent();
        iw.println("else");
        iw.println("{");
        iw.upIndent();
        iw.println("parentPooledConnection.markInactiveUncachedStatement( inner );");

        iw.println("try{ inner.close(); }");
        iw.println("catch (Exception e )");
        iw.println("{");
        iw.upIndent();

        iw.println("if (logger.isLoggable( MLevel.WARNING ))");
        iw.upIndent();
        iw.println(
            "logger.log( MLevel.WARNING, \042Exception on close of inner statement.\042, e);");
        iw.downIndent();

        iw.println("SQLException sqle = SqlUtils.toSQLException( e );");
        iw.println("throw sqle;");
        iw.downIndent();
        iw.println("}");
        iw.downIndent();
        iw.println("}");

        iw.println();
        iw.println("this.detach();");
        iw.println("this.inner = null;");
        iw.println("this.creatorProxy = null;");

        iw.downIndent();
        iw.println("}");
      } else if (mname.equals("isClosed")) {
        iw.println("return this.isDetached();");
      } else super.generateDelegateCode(intfcl, genclass, method, iw);
    }