Examples with ResourceException org.restlet.resource.ResourceException used on opensource projects

Example 36 with ResourceException

use of org.restlet.resource.ResourceException in project qi4j-sdk by Qi4j.

the class ContextRestlet method handle.

@Override
public void handle(Request request, Response response) {
    super.handle(request, response);
    MDC.put("url", request.getResourceRef().toString());
    try {
        int tries = 0;
        // TODO Make this number configurable
        while (tries < 10) {
            tries++;
            // Root of the call
            Reference ref = request.getResourceRef();
            List<String> segments = ref.getScheme().equals("riap") ? ref.getRelativeRef(new Reference("riap://application/")).getSegments() : ref.getRelativeRef().getSegments();
            // Handle conversion of verbs into standard interactions
            if (segments.get(segments.size() - 1).equals("")) {
                if (request.getMethod().equals(Method.DELETE)) {
                    // Translate DELETE into command "delete"
                    segments.set(segments.size() - 1, "delete");
                } else if (request.getMethod().equals(Method.PUT)) {
                    // Translate PUT into command "update"
                    segments.set(segments.size() - 1, "update");
                }
            }
            request.getAttributes().put("segments", segments);
            request.getAttributes().put("template", new StringBuilder("/rest/"));
            Usecase usecase = UsecaseBuilder.buildUsecase(getUsecaseName(request)).withMetaInfo(request.getMethod().isSafe() ? CacheOptions.ALWAYS : CacheOptions.NEVER).newUsecase();
            UnitOfWork uow = module.newUnitOfWork(usecase);
            ObjectSelection.newSelection();
            try {
                // Start handling the build-up for the context
                Uniform resource = createRoot(request, response);
                resource.handle(request, response);
                if (response.getEntity() != null) {
                    if (response.getEntity().getModificationDate() == null) {
                        ResourceValidity validity = (ResourceValidity) Request.getCurrent().getAttributes().get(ContextResource.RESOURCE_VALIDITY);
                        if (validity != null) {
                            validity.updateResponse(response);
                        }
                    }
                    // Check if characterset is set
                    if (response.getEntity().getCharacterSet() == null) {
                        response.getEntity().setCharacterSet(CharacterSet.UTF_8);
                    }
                    // Check if language is set
                    if (response.getEntity().getLanguages().isEmpty()) {
                        response.getEntity().getLanguages().add(Language.ENGLISH);
                    }
                    uow.discard();
                } else {
                    // Check if last modified and tag is set
                    ResourceValidity validity = null;
                    try {
                        validity = ObjectSelection.type(ResourceValidity.class);
                    } catch (IllegalArgumentException e) {
                    // Ignore
                    }
                    uow.complete();
                    Object result = commandResult.getResult();
                    if (result != null) {
                        if (result instanceof Representation) {
                            response.setEntity((Representation) result);
                        } else {
                            if (!responseWriter.writeResponse(result, response)) {
                                throw new ResourceException(Status.SERVER_ERROR_INTERNAL, "Could not write result of type " + result.getClass().getName());
                            }
                        }
                        if (response.getEntity() != null) {
                            // Check if characterset is set
                            if (response.getEntity().getCharacterSet() == null) {
                                response.getEntity().setCharacterSet(CharacterSet.UTF_8);
                            }
                            // Check if language is set
                            if (response.getEntity().getLanguages().isEmpty()) {
                                response.getEntity().getLanguages().add(Language.ENGLISH);
                            }
                            // Check if last modified and tag should be set
                            if (validity != null) {
                                UnitOfWork lastModifiedUoW = module.newUnitOfWork();
                                try {
                                    validity.updateEntity(lastModifiedUoW);
                                    validity.updateResponse(response);
                                } finally {
                                    lastModifiedUoW.discard();
                                }
                            }
                        }
                    }
                    return;
                }
                return;
            } catch (ConcurrentEntityModificationException ex) {
                uow.discard();
                // Try again
                ObjectSelection.newSelection();
            } catch (Throwable e) {
                uow.discard();
                handleException(response, e);
                return;
            }
        }
    // Try again
    } finally {
        MDC.clear();
    }
}

Example 37 with ResourceException

use of org.restlet.resource.ResourceException in project qi4j-sdk by Qi4j.

the class ResourceValidity method checkRequest.

public void checkRequest() throws ResourceException {
    // Check command rules
    Date modificationDate = request.getConditions().getUnmodifiedSince();
    if (modificationDate != null) {
        EntityState state = spi.entityStateOf(entity);
        // Cut off milliseconds
        Date lastModified = new Date((state.lastModified() / 1000) * 1000);
        if (lastModified.after(modificationDate)) {
            throw new ResourceException(Status.CLIENT_ERROR_CONFLICT);
        }
    }
    // Check query rules
    modificationDate = request.getConditions().getModifiedSince();
    if (modificationDate != null) {
        EntityState state = spi.entityStateOf(entity);
        // Cut off milliseconds
        Date lastModified = new Date((state.lastModified() / 1000) * 1000);
        if (!lastModified.after(modificationDate)) {
            throw new ResourceException(Status.REDIRECTION_NOT_MODIFIED);
        }
    }
}

Example 38 with ResourceException

use of org.restlet.resource.ResourceException in project qi4j-sdk by Qi4j.

the class ContextResource method handleQuery.

private void handleQuery(String segment) {
    Request request = Request.getCurrent();
    Response response = Response.getCurrent();
    // Query
    // Try to locate either the query method or command method that should be used
    Method queryMethod = resourceMethodQueries.get(segment);
    if (queryMethod == null) {
        queryMethod = resourceMethodCommands.get(segment);
    }
    if (queryMethod == null) {
        // Not found as interaction, try SubResource
        Method resourceMethod = subResources.get(segment);
        if (resourceMethod != null && resourceMethod.getAnnotation(SubResource.class) != null) {
            // Found it! Redirect to it
            response.setStatus(Status.REDIRECTION_FOUND);
            response.setLocationRef(new Reference(request.getResourceRef().toString() + "/").toString());
            return;
        } else {
            // 404
            throw new ResourceException(Status.CLIENT_ERROR_NOT_FOUND);
        }
    }
    // Check if this is a request to show the form for this interaction
    if ((request.getMethod().isSafe() && queryMethod.getParameterTypes().length != 0 && request.getResourceRef().getQuery() == null) || (!request.getMethod().isSafe() && queryMethod.getParameterTypes().length != 0 && !(request.getEntity().isAvailable() || request.getResourceRef().getQuery() != null || queryMethod.getParameterTypes()[0].equals(Response.class)))) {
        // Show form
        try {
            // Tell client to try again
            response.setStatus(Status.CLIENT_ERROR_UNPROCESSABLE_ENTITY);
            response.getAllowedMethods().add(org.restlet.data.Method.GET);
            response.getAllowedMethods().add(org.restlet.data.Method.POST);
            result(formForMethod(queryMethod));
        } catch (Exception e) {
            handleException(response, e);
        }
    } else {
        // Check timestamps
        ResourceValidity validity = (ResourceValidity) request.getAttributes().get(RESOURCE_VALIDITY);
        if (validity != null) {
            validity.checkRequest();
        }
        // Check method constraints
        if (!constraints.isValid(queryMethod, current(), module)) {
            throw new ResourceException(Status.CLIENT_ERROR_NOT_FOUND);
        }
        try {
            // Create argument
            Object[] arguments;
            if (queryMethod.getParameterTypes().length > 0) {
                try {
                    arguments = requestReader.readRequest(Request.getCurrent(), queryMethod);
                    if (arguments == null) {
                        // Show form
                        result(formForMethod(queryMethod));
                        return;
                    }
                } catch (IllegalArgumentException e) {
                    // Still missing some values - show form
                    result(formForMethod(queryMethod));
                    return;
                }
            } else {
                // No arguments to this query
                arguments = new Object[0];
            }
            // Invoke method
            Request.getCurrent().getAttributes().put(ARGUMENTS, arguments);
            Object result = queryMethod.invoke(this, arguments);
            if (result != null) {
                if (result instanceof Representation) {
                    response.setEntity((Representation) result);
                } else {
                    result(convert(result));
                }
            }
        } catch (Throwable e) {
            handleException(response, e);
        }
    }
}

Example 39 with ResourceException

use of org.restlet.resource.ResourceException in project qi4j-sdk by Qi4j.

the class ContextResource method select.

protected <T> T select(Class<T> entityClass, String id) throws ResourceException {
    try {
        T composite = module.currentUnitOfWork().get(entityClass, id);
        current().select(composite);
        return composite;
    } catch (EntityTypeNotFoundException | NoSuchEntityException e) {
        throw new ResourceException(Status.CLIENT_ERROR_NOT_FOUND);
    }
}

Example 40 with ResourceException

use of org.restlet.resource.ResourceException in project qi4j-sdk by Qi4j.

the class ContextResourceClient method delete.

// Delete
public HandlerCommand delete(ResponseHandler responseHandler, ResponseHandler processingErrorHandler) throws ResourceException {
    if (responseHandler == null)
        responseHandler = deleteHandler;
    Request request = new Request(Method.DELETE, new Reference(reference.toUri()).toString());
    contextResourceFactory.updateCommandRequest(request);
    int tries = 3;
    while (true) {
        Response response = new Response(request);
        try {
            contextResourceFactory.getClient().handle(request, response);
            if (!response.getStatus().isSuccess()) {
                return errorHandler.handleResponse(response, this);
            } else {
                // Reset modification date
                contextResourceFactory.updateCache(response);
                return responseHandler.handleResponse(response, this);
            }
        } catch (ResourceException e) {
            if (e.getStatus().equals(Status.CONNECTOR_ERROR_COMMUNICATION) || e.getStatus().equals(Status.CONNECTOR_ERROR_CONNECTION)) {
                if (tries == 0) {
                    // Give up
                    throw e;
                } else {
                    // Try again
                    tries--;
                    continue;
                }
            } else {
                // Abort
                throw e;
            }
        } finally {
            try {
                response.getEntity().exhaust();
            } catch (Throwable e) {
            // Ignore
            }
        }
    }
}