Examples with Visitor io.fabric8.kubernetes.api.builder.Visitor used on opensource projects

Example 1 with Visitor

use of io.fabric8.kubernetes.api.builder.Visitor in project fabric8 by jboss-fuse.

the class TraceStrategy method transform.

@Override
public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException {
    byte[] buffer = null;
    ClassInfo classInfo = context.getClassInfo(className);
    classInfo.setOriginalClass(classBeingRedefined);
    if (classInfo.getTransformed() == null) {
        // we haven't been transformed before
        classInfo.setOriginal(classfileBuffer);
    }
    if (!cleanUp.get()) {
        byte[] classBufferToRedefine = classInfo.getOriginal();
        if (configuration.isAudit(className)) {
            if (classInfo.isTransformed()) {
                // remove metrics from methods no longer defined
                context.resetMethods(classInfo);
            }
            ClassReader cr = new ClassReader(classBufferToRedefine);
            ClassWriter cw = new ClassWriter(cr, ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
            ApmClassVisitor visitor = new ApmClassVisitor(this, cw, classInfo);
            cr.accept(visitor, ClassReader.SKIP_FRAMES);
            buffer = cw.toByteArray();
            if (!verifyClass(className, buffer)) {
                classInfo.setCanTransform(false);
                buffer = null;
            }
            classInfo.setTransformed(buffer);
        }
    } else {
        if (classInfo.getOriginal() != null) {
            buffer = classInfo.getOriginal();
            context.resetAll(classInfo);
        }
    }
    return buffer;
}

Example 2 with Visitor

use of io.fabric8.kubernetes.api.builder.Visitor in project fabric8 by jboss-fuse.

the class SubsystemResolveContext method findProviders.

@Override
public List<Capability> findProviders(Requirement requirement) {
    List<Capability> caps = new ArrayList<Capability>();
    Region requirerRegion = getRegion(requirement.getResource());
    if (requirerRegion != null) {
        Map<Requirement, Collection<Capability>> resMap = repository.findProviders(Collections.singleton(requirement));
        Collection<Capability> res = resMap != null ? resMap.get(requirement) : null;
        if (res != null && !res.isEmpty()) {
            caps.addAll(res);
        } else if (globalRepository != null) {
            // Only bring in external resources for non optional requirements
            if (!RESOLUTION_OPTIONAL.equals(requirement.getDirectives().get(RESOLUTION_DIRECTIVE))) {
                resMap = globalRepository.findProviders(Collections.singleton(requirement));
                res = resMap != null ? resMap.get(requirement) : null;
                if (res != null && !res.isEmpty()) {
                    caps.addAll(res);
                }
            }
        }
        // Use the digraph to prune non visible capabilities
        Visitor visitor = new Visitor(caps);
        requirerRegion.visitSubgraph(visitor);
        Collection<Capability> allowed = visitor.getAllowed();
        caps.retainAll(allowed);
        // the parent one
        if (caps.size() > 1) {
            Map<String, Resource> providers = new HashMap<String, Resource>();
            for (Capability cap : caps) {
                Resource resource = cap.getResource();
                String id = getSymbolicName(resource) + "|" + getVersion(resource);
                Resource prev = providers.get(id);
                if (prev != null && prev != resource) {
                    Region r1 = getRegion(prev);
                    Region r2 = getRegion(resource);
                    boolean r2canSeeR1 = isResourceVisibleFromRegion(prev, r2);
                    boolean r1canSeeR2 = isResourceVisibleFromRegion(resource, r1);
                    if (r1canSeeR2 && r2canSeeR1) {
                        // r1 and r2 can see each other
                        int reqDiff = prev.getRequirements(null).size() - resource.getRequirements(null).size();
                        if (reqDiff == 0) {
                            String r1Name = getRegion(prev).getName();
                            String r2Name = getRegion(resource).getName();
                            int c = r1Name.compareTo(r2Name);
                            if (c == 0) {
                                // One of the resource has to be a bundle, use that one
                                c = (prev instanceof BundleRevision) ? -1 : +1;
                            }
                            resource = c < 0 ? prev : resource;
                        } else {
                            // one of the resource has less requirements, so use this one
                            // This can be the case when one resource has conditionals, which adds further
                            // requirements to the condition feature.
                            resource = reqDiff < 0 ? prev : resource;
                        }
                    } else {
                        // only one region can see the other, grab the correct
                        resource = r1canSeeR2 ? prev : resource;
                    }
                }
                providers.put(id, resource);
            }
            for (Iterator<Capability> it = caps.iterator(); it.hasNext(); ) {
                Capability cap = it.next();
                if (!providers.values().contains(cap.getResource())) {
                    it.remove();
                }
            }
        }
        // Sort caps
        Collections.sort(caps, candidateComparator);
    }
    return caps;
}

Example 3 with Visitor

use of io.fabric8.kubernetes.api.builder.Visitor in project fabric8 by fabric8io.

the class KubernetesModelProcessorProcessor method process.

@Override
public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
    CompilationTaskFactory compilationTaskFactory = new CompilationTaskFactory(processingEnv);
    Set<TypeElement> processors = new HashSet<>();
    // 1st pass collect classes to compile.
    for (Element element : roundEnv.getElementsAnnotatedWith(KubernetesModelProcessor.class)) {
        processors.add(getClassElement(element));
    }
    if (processors.isEmpty()) {
        return true;
    }
    StringWriter writer = new StringWriter();
    try {
        Callable<Boolean> compileTask = compilationTaskFactory.create(processors, writer);
        if (!compileTask.call()) {
            processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Failed to compile provider classes. See output below.");
            printCompileErrors(compilationTaskFactory);
            return false;
        }
    } catch (Exception e) {
        processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Error to compile provider classes, due to: " + e.getMessage() + ". See output below.");
        return false;
    } finally {
        String output = writer.toString();
        if (Strings.isNullOrBlank(output)) {
            output = "success";
        }
        processingEnv.getMessager().printMessage(Diagnostic.Kind.NOTE, "Fabric8 model generator compiler output:" + output);
    }
    // 2nd pass generate json.
    for (Element element : roundEnv.getElementsAnnotatedWith(KubernetesModelProcessor.class)) {
        KubernetesModelProcessor annotation = element.getAnnotation(KubernetesModelProcessor.class);
        String kubernetesJsonFileName = annotation.value();
        KubernetesResource json = readJson(kubernetesJsonFileName);
        Builder<? extends KubernetesResource> builder;
        if (json instanceof KubernetesList) {
            builder = new KubernetesListBuilder((KubernetesList) json);
        } else if (json instanceof Template) {
            builder = new TemplateBuilder((Template) json);
        } else if (json != null) {
            processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Unknown Kubernetes json type:" + json.getClass());
            return false;
        } else {
            return false;
        }
        try {
            if (element instanceof TypeElement) {
                for (ExecutableElement methodElement : ElementFilter.methodsIn(element.getEnclosedElements())) {
                    TypeElement classElement = getClassElement(element);
                    Class<?> cls = Class.forName(classElement.getQualifiedName().toString());
                    final Object instance = cls.newInstance();
                    final String methodName = methodElement.getSimpleName().toString();
                    if (builder instanceof Visitable) {
                        ((Visitable) builder).accept(new Visitor() {

                            @Override
                            public void visit(Object o) {
                                for (Method m : findMethods(instance, methodName, o.getClass())) {
                                    Named named = m.getAnnotation(Named.class);
                                    if (named != null && !Strings.isNullOrBlank(named.value())) {
                                        String objectName = getName(o);
                                        // If a name has been explicitly specified check if there is a match
                                        if (!named.value().equals(objectName)) {
                                            processingEnv.getMessager().printMessage(Diagnostic.Kind.WARNING, "Named method:" + m.getName() + " with name:" + named.value() + " doesn't match: " + objectName + ", ignoring");
                                            return;
                                        }
                                    }
                                    try {
                                        m.invoke(instance, o);
                                    } catch (IllegalAccessException e) {
                                        processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Error invoking visitor method:" + m.getName() + " on:" + instance + "with argument:" + o);
                                    } catch (InvocationTargetException e) {
                                        processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Error invoking visitor method:" + m.getName() + " on:" + instance + "with argument:" + o);
                                    }
                                }
                            }
                        });
                    } else {
                        processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Json type is not visitable.");
                    }
                }
            }
            json = builder.build();
            generateJson(kubernetesJsonFileName, json);
        } catch (Exception ex) {
            processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Error creating Kubernetes configuration:" + ex.getMessage());
        }
    }
    return true;
}

Example 4 with Visitor

use of io.fabric8.kubernetes.api.builder.Visitor in project fabric8 by fabric8io.

the class TraceStrategy method transform.

@Override
public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException {
    byte[] buffer = null;
    ClassInfo classInfo = context.getClassInfo(className);
    classInfo.setOriginalClass(classBeingRedefined);
    if (classInfo.getTransformed() == null) {
        // we haven't been transformed before
        classInfo.setOriginal(classfileBuffer);
    }
    if (!cleanUp.get()) {
        byte[] classBufferToRedefine = classInfo.getOriginal();
        if (configuration.isAudit(className)) {
            if (classInfo.isTransformed()) {
                // remove metrics from methods no longer defined
                context.resetMethods(classInfo);
            }
            ClassReader cr = new ClassReader(classBufferToRedefine);
            ClassWriter cw = new ClassWriter(cr, ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
            ApmClassVisitor visitor = new ApmClassVisitor(this, cw, classInfo);
            cr.accept(visitor, ClassReader.SKIP_FRAMES);
            buffer = cw.toByteArray();
            if (!verifyClass(className, buffer)) {
                classInfo.setCanTransform(false);
                buffer = null;
            }
            classInfo.setTransformed(buffer);
        }
    } else {
        if (classInfo.getOriginal() != null) {
            buffer = classInfo.getOriginal();
            context.resetAll(classInfo);
        }
    }
    return buffer;
}

Example 5 with Visitor

use of io.fabric8.kubernetes.api.builder.Visitor in project fabric8 by fabric8io.

the class SessionListener method enhance.

private KubernetesList enhance(final Session session, Configuration configuration, KubernetesList kubernetesList) {
    if (configuration == null || configuration.getProperties() == null || !configuration.getProperties().containsKey(Constants.KUBERNETES_MODEL_PROCESSOR_CLASS)) {
        return kubernetesList;
    }
    String processorClassName = configuration.getProperties().get(Constants.KUBERNETES_MODEL_PROCESSOR_CLASS);
    try {
        final Object instance = SessionListener.class.getClassLoader().loadClass(processorClassName).newInstance();
        KubernetesListBuilder builder = new KubernetesListBuilder(kubernetesList);
        ((Visitable) builder).accept(new Visitor() {

            @Override
            public void visit(Object o) {
                for (Method m : findMethods(instance, o.getClass())) {
                    Named named = m.getAnnotation(Named.class);
                    if (named != null && !Strings.isNullOrBlank(named.value())) {
                        String objectName = o instanceof ObjectMeta ? getName((ObjectMeta) o) : getName((HasMetadata) o);
                        // If a name has been explicitly specified check if there is a match
                        if (!named.value().equals(objectName)) {
                            session.getLogger().warn("Named method:" + m.getName() + " with name:" + named.value() + " doesn't match: " + objectName + ", ignoring");
                            return;
                        }
                    }
                    try {
                        m.invoke(instance, o);
                    } catch (IllegalAccessException e) {
                    } catch (InvocationTargetException e) {
                        session.getLogger().error("Error invoking visitor method:" + m.getName() + " on:" + instance + "with argument:" + o);
                    }
                }
            }
        });
        return builder.build();
    } catch (Exception e) {
        session.getLogger().warn("Failed to load processor class:" + processorClassName + ". Ignoring");
        return kubernetesList;
    }
}