Package org.drools.rule

Examples of org.drools.rule.MapBackedClassLoader

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    /**
     * For a given list of Jars, create a class loader.
     */
    public MapBackedClassLoader buildClassLoader() {
        MapBackedClassLoader mapBackedClassLoader = getMapBackedClassLoader();

        try {
            for (JarInputStream jis : jarInputStreams) {
                JarEntry entry = null;
                byte[] buf = new byte[1024];
                int len = 0;
                while ((entry = jis.getNextJarEntry()) != null) {
                    if (!entry.isDirectory() && !entry.getName().endsWith(".java")) {
                        ByteArrayOutputStream out = new ByteArrayOutputStream();
                        while ((len = jis.read(buf)) >= 0) {
                            out.write(buf, 0, len);
                        }

                        mapBackedClassLoader.addResource(entry.getName(), out.toByteArray());
                    }
                }

            }
        } catch (IOException e) {
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    }

    private MapBackedClassLoader getMapBackedClassLoader() {
        return AccessController.doPrivileged(new PrivilegedAction<MapBackedClassLoader>() {
            public MapBackedClassLoader run() {
                return new MapBackedClassLoader(getParentClassLoader());
            }
        });
    }
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        resolver = new ClassTypeResolver( new HashSet<String>(),
                                          loader );
    }

    private MapBackedClassLoader getMapBackedClassLoader(ClassLoader classLoader) {
        MapBackedClassLoader mapBackedClassLoader = new MapBackedClassLoader( createClassLoader( classLoader ) );

        return mapBackedClassLoader;
    }
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    /**
     * In this case we are dealing with facts which are not on the systems classpath.
     */
    @Test
    public void testSerializabilityWithJarFacts() throws Exception {
        MapBackedClassLoader loader = new MapBackedClassLoader( this.getClass().getClassLoader() );

        JarInputStream jis = new JarInputStream( this.getClass().getResourceAsStream( "/billasurf.jar" ) );

        JarEntry entry = null;
        byte[] buf = new byte[1024];
        int len = 0;
        while ( (entry = jis.getNextJarEntry()) != null ) {
            if ( !entry.isDirectory() ) {
                ByteArrayOutputStream out = new ByteArrayOutputStream();
                while ( (len = jis.read( buf )) >= 0 ) {
                    out.write( buf,
                               0,
                               len );
                }
                loader.addResource( entry.getName(),
                                    out.toByteArray() );
            }
        }

        String drl = "package foo.bar \n" +
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    /**
     * In this case we are dealing with facts which are not on the systems classpath.
     */
    @Test
    public void testSerializabilityWithJarFacts() throws Exception {
        MapBackedClassLoader loader = new MapBackedClassLoader( this.getClass().getClassLoader() );

        JarInputStream jis = new JarInputStream( this.getClass().getResourceAsStream( "/billasurf.jar" ) );

        JarEntry entry = null;
        byte[] buf = new byte[1024];
        int len = 0;
        while ( (entry = jis.getNextJarEntry()) != null ) {
            if ( !entry.isDirectory() ) {
                ByteArrayOutputStream out = new ByteArrayOutputStream();
                while ( (len = jis.read( buf )) >= 0 ) {
                    out.write( buf,
                               0,
                               len );
                }
                loader.addResource( entry.getName(),
                                    out.toByteArray() );
            }
        }

        String drl = "package foo.bar \n" +
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        try {
            jis = new JarInputStream( this.getClass().getResourceAsStream( "/eventing-example.jar" ) );
        } catch (IOException e) {
            fail("Failed to load the jar");
        }
        MapBackedClassLoader loader = createClassLoader( jis );

        KnowledgeBuilderConfiguration knowledgeBuilderConfiguration = KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(null, loader);
        KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(knowledgeBuilderConfiguration);
        kbuilder.add( ResourceFactory.newByteArrayResource( str.getBytes() ), ResourceType.DRL );
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    public static MapBackedClassLoader createClassLoader(JarInputStream jis) {
        ClassLoader parentClassLoader = Thread.currentThread().getContextClassLoader();

        final ClassLoader p = parentClassLoader;

        MapBackedClassLoader loader = AccessController.doPrivileged(new PrivilegedAction<MapBackedClassLoader>() {
            public MapBackedClassLoader run() {
                return new MapBackedClassLoader(p);
            }
        });

        try {
            JarEntry entry = null;
            byte[] buf = new byte[1024];
            int len = 0;
            while ((entry = jis.getNextJarEntry()) != null) {
                if (!entry.isDirectory() && !entry.getName().endsWith(".java")) {
                    ByteArrayOutputStream out = new ByteArrayOutputStream();
                    while ((len = jis.read(buf)) >= 0) {
                        out.write(buf, 0, len);
                    }

                    loader.addResource(entry.getName(), out.toByteArray());
                }
            }

        } catch (IOException e) {
            fail("failed to read the jar");
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    /**
     * In this case we are dealing with facts which are not on the systems classpath.
     *
     */
    public void testSerializabilityWithJarFacts() throws Exception {
        MapBackedClassLoader loader = new MapBackedClassLoader( this.getClass().getClassLoader() );

        JarInputStream jis = new JarInputStream( this.getClass().getResourceAsStream( "/billasurf.jar" ) );

        JarEntry entry = null;
        byte[] buf = new byte[1024];
        int len = 0;
        while ( (entry = jis.getNextJarEntry()) != null ) {
            if ( !entry.isDirectory() ) {
                ByteArrayOutputStream out = new ByteArrayOutputStream();
                while ( (len = jis.read( buf )) >= 0 ) {
                    out.write( buf,
                               0,
                               len );
                }
                loader.addResource( entry.getName(),
                                    out.toByteArray() );
            }
        }

        String drl = "package foo.bar \n" + "import com.billasurf.Board\n" + "rule 'MyGoodRule' \n dialect 'mvel' \n when Board() then System.err.println(42); \n end\n";
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        loader = getMapBackedClassLoader(classLoader);
        resolver = new ClassTypeResolver(new HashSet<String>(), loader);
    }

    private MapBackedClassLoader getMapBackedClassLoader(ClassLoader classLoader) {
        MapBackedClassLoader mapBackedClassLoader = new MapBackedClassLoader(createClassLoader(classLoader));

        return mapBackedClassLoader;
    }
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        resolver = new ClassTypeResolver( new HashSet<String>(),
                                          loader );
    }

    private MapBackedClassLoader getMapBackedClassLoader(ClassLoader classLoader) {
        MapBackedClassLoader mapBackedClassLoader = new MapBackedClassLoader( createClassLoader( classLoader ) );

        return mapBackedClassLoader;
    }
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Related Classes of org.drools.rule.MapBackedClassLoader

  • org.drools.brms.server.rules.SuggestionCompletionLoader
  • org.drools.common.AbstractRuleBase
  • org.drools.guvnor.server.builder.BRMSPackageBuilder
  • org.drools.guvnor.server.builder.ClassLoaderBuilder
  • org.drools.guvnor.server.rules.SuggestionCompletionLoader
  • org.drools.ide.common.server.rules.SuggestionCompletionLoader
  • org.drools.integrationtests.marshalling.MarshallingTest
  • org.drools.integrationtests.MarshallingTest
  • org.drools.integrationtests.MiscTest
  • org.drools.integrationtests.MVELTest
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