001: /*
002: * <copyright>
003: *
004: * Copyright 2003-2004 BBNT Solutions, LLC
005: * under sponsorship of the Defense Advanced Research Projects
006: * Agency (DARPA).
007: *
008: * You can redistribute this software and/or modify it under the
009: * terms of the Cougaar Open Source License as published on the
010: * Cougaar Open Source Website (www.cougaar.org).
011: *
012: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
013: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
014: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
015: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
016: * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
017: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
018: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
019: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
020: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
021: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
022: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
023: *
024: * </copyright>
025: */
026:
027: package org.cougaar.lib.aggagent.script;
028:
029: import org.python.core.BytecodeLoader;
030: import org.python.core.Py;
031: import org.python.util.PythonInterpreter;
032:
033: /**
034: * The purpose of the NoErrorPython class is to be a directly instantiable
035: * subclass of PythonInterpreter within the COUGAAR framework. Interaction
036: * between COUGAAR's BootstrapClassLoader and JPython's custom ClassLoader
037: * turns out to be fatal (for JPython) unless this class is used.
038: * <br><br>
039: * Note: This implementation is only necessary because of the way jython
040: * keeps track of java packages using system properties.
041: */
042: public class NoErrorPython extends PythonInterpreter {
043: /**
044: * Static initializer tries to initialize python system properties based on cougaar properties. It will gracefully fail if
045: * permission is denied, but then you'd better have all the jars you need in java.class.path.
046: */
047: static {
048: try {
049: String pathsep = java.io.File.pathSeparator;
050: String filesep = java.io.File.separator;
051: // "python.packages.path" refers to list of properties that contain class paths. Add org.cougaar.class.path to that list.
052: String ccp = System.getProperty("org.cougaar.class.path");
053: if (ccp != null) {
054: System
055: .setProperty(
056: "python.packages.paths",
057: "org.cougaar.lib.aggagent.python.class.path,java.class.path,sun.boot.class.path");
058: System.setProperty(
059: "org.cougaar.lib.aggagent.python.class.path",
060: ccp);
061: }
062:
063: // "python.packages.directories" refers to list of properties that contain directorys paths.
064: // Add org.cougaar.install.path /lib and /sys to that list. Also add org.cougaar.system.path for "3rd party" stuff.
065: String cip = System.getProperty("org.cougaar.install.path");
066: // always add lib and sys directories
067: String dirPath = cip + filesep + "lib" + pathsep + cip
068: + filesep + "sys" + pathsep + cip + filesep
069: + "plugins";
070: String csp = System.getProperty("org.cougaar.system.path");
071: if (csp != null)
072: dirPath += pathsep + csp;
073:
074: System
075: .setProperty("python.packages.directories",
076: "org.cougaar.lib.aggagent.python.directories,java.ext.dirs");
077: System.setProperty(
078: "org.cougaar.lib.aggagent.python.directories",
079: dirPath);
080:
081: // jython will write a cache of processed JAR files in "." unless we set "python.cachedir"
082: // Set it here unless it is already set.
083: if (System.getProperty("python.cachedir") == null) {
084: String cougaarWorkspace = System.getProperty(
085: "org.cougaar.workspace", cip
086: + java.io.File.separator + "workspace");
087: System.setProperty("python.cachedir", cougaarWorkspace
088: + java.io.File.separator + "jythoncache");
089: }
090: } catch (SecurityException ex) {
091: //ex.printStackTrace();
092: // Well, we tried.
093: }
094: }
095:
096: /**
097: * Create a new
098: */
099: public NoErrorPython() {
100: Py.getSystemState().setClassLoader(
101: BytecodeLoader.class.getClassLoader());
102: }
103: }
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