I want to read file(s) from a location, extract the fileName & make a rest call (GET) with the fileName as a request parameter. The file name is required to be passed dynamically as each file will be unique. I used toD() after going through the tutorials. The high level pseudo code is provided below (I am just interested with the status code from this call. There's further operations required after this.).
The issue I am facing now using toD() is that it is running into an infinite loop after making the Get service call.
How can this issue be handled? Appreciate your suggestions!
from("file:C:/inbound?delete=true&noop=true")
.process(new Processor() {
public void process(Exchange exchange) throws Exception {
String fileName = exchange.getIn().getHeader("CamelFileName").toString();
exchange.getIn().setHeader("fileName", fileName);
}
})
.setHeader(Exchange.HTTP_METHOD, simple("GET"))
.toD("http://localhost:8090/fileWatcher?fileName=${header.fileName}")
Here's a simple Get endpoint mockup running on port 8090:
#RequestMapping(value = "/fileWatcher", method = RequestMethod.GET)
public ResponseEntity<FileDetails> firstService(#RequestParam String fileName) {
return new ResponseEntity<>(HttpStatus.OK);
}
Related
I am trying to transfer any files (video,txt etc) between different endpoints (pc, s3, dropbox, google drive) using spring-batch on a network. For that, I am getting json file containing list of files location(url) to be transferred (assume I can access those location).
So, how do I tell the reader to read the input once my controller is hit (in which job is created) and not at the time of starting spring-boot application?
I have tried adding "spring.batch.job.enabled=false" which stops spring-batch to start automatically but my concern is where should I write setting my resource line that will be provided to ItemReader :
FlatFileItemReader<String> reader = new FlatFileItemReader<String>();
reader.setResource(someResource);
Because during setting resources I am getting NullPointerException.
The Running Jobs from within a Web Container explains that with a code example. Here is an except:
#Controller
public class JobLauncherController {
#Autowired
JobLauncher jobLauncher;
#Autowired
Job job;
#RequestMapping("/jobLauncher.html")
public void handle() throws Exception{
jobLauncher.run(job, new JobParameters());
}
}
In your case, you need to extract the file name from the request and pass it as a job parameter, something like:
#RequestMapping("/jobLauncher.html")
public void handle() throws Exception{
URL url = // extract url from request
JobParameters parameters = new JobParametersBuilder()
.addString("url", url)
.toJobParameters();
jobLauncher.run(job, parameters);
}
Then make your reader step-scoped and dynamically extract the file from job parameters:
#StepScope
#Bean
public FlatFileItemReader flatFileItemReader(#Value("#{jobParameters['url']}") URL url) {
return new FlatFileItemReaderBuilder<String>()
.resource(new UrlResource(url))
// set other properties
.build();
}
This is explained in the Late Binding of Job and Step Attributes section.
I have a service implemented with Dropwizard and I need to dump incorrect requests somewhere.
I saw that there is a possibility to customise the error message by registering ExceptionMapper<JerseyViolationException>. But I need to have the complete request (headers, body) and not only ConstraintViolations.
You can inject ContainerRequest into the ExceptionMapper. You need to inject it as a javax.inject.Provider though, so that you can lazily retrieve it. Otherwise you will run into scoping problems.
#Provider
public class Mapper implements ExceptionMapper<ConstraintViolationException> {
#Inject
private javax.inject.Provider<ContainerRequest> requestProvider;
#Override
public Response toResponse(ConstraintViolationException ex) {
ContainerRequest request = requestProvider.get();
}
}
(This also works with constructor argument injection instead of field injection.)
In the ContainerRequest, you can get headers with getHeaderString() or getHeaders(). If you want to get the body, you need to do a little hack because the entity stream is already read by Jersey by the time the mapper is reached. So we need to implement a ContainerRequestFilter to buffer the entity.
public class EntityBufferingFilter implements ContainerRequestFilter {
#Override
public void filter(ContainerRequestContext containerRequestContext) throws IOException {
ContainerRequest request = (ContainerRequest) containerRequestContext;
request.bufferEntity();
}
}
You might not want this filter to be called for all requests (for performance reasons), so you might want to use a DynamicFeature to register the filter just on methods that use bean validation (or use Name Binding).
Once you have this filter registered, you can read the body using ContainerRequest#readEntity(Class). You use this method just like you would on the client side with Response#readEntity(). So for the class, if you want to keep it generic, you can use String.class or InputStream.class and convert the InputStream to a String.
ContainerRequest request = requestProvider.get();
String body = request.readEntity(String.class);
We are trying to provide a clean URI structure for external endpoints to pull json information from CQ5.
For example, if you want to fetch information about a particular users history (assuming you have permissions etc), ideally we would like the endpoint to be able to do the following:
/bin/api/user/abc123/phone/555-klondike-5/history.json
In the URI, we would specifying /bin/api/user/{username}/phone/{phoneNumber}/history.json so that it is very easy to leverage the dispatcher to invalidate caching changes etc without invalidating a broad swath of cached information.
We would like to use a sling servlet to handle the request, however, I am not aware as to how to put variables into the path.
It would be great if there were something like #PathParam from JaxRS to add to the sling path variable, but I suspect it's not available.
The other approach we had in mind was to use a selector to recognise when we are accessing the api, and thus could return whatever we wanted to from the path, but it would necessitate a singular sling servlet to handle all of the requests, and so I am not happy about the approach as it glues a lot of unrelated code together.
Any help with this would be appreciated.
UPDATE:
If we were to use a OptingServlet, then put some logic inside the accepts function, we could stack a series of sling servlets on and make the acceptance decisions from the path with a regex.
Then during execution, the path itself can be parsed for the variables.
If the data that you provide comes from the JCR repository, the best is to structure it exactly as you want the URLs to be, that's the recommended way of doing things with Sling.
If the data is external you can create a custom Sling ResourceProvider that you mount on the /bin/api/user path and acquires or generates the corresponding data based on the rest of the path.
The Sling test suite's PlanetsResourceProvider is a simple example of that, see http://svn.apache.org/repos/asf/sling/trunk/launchpad/test-services/src/main/java/org/apache/sling/launchpad/testservices/resourceprovider/
The Sling resources docs at https://sling.apache.org/documentation/the-sling-engine/resources.html document the general resource resolution mechanism.
It is now possible to integrate jersy(JAX-RS) with CQ. We are able to create primitive prototype to say "Hello" to the world.
https://github.com/hstaudacher/osgi-jax-rs-connector
With this we can use the #PathParam to map the requests
Thanks and Regards,
San
There is no direct way to create such dynamic paths. You could register servlet under /bin/api/user.json and provide the rest of the path as a suffix:
/bin/api/user.json/abc123/phone/555-klondike-5/history
^ ^
| |
servlet path suffix starts here
then you could parse the suffix manually:
#SlingServlet(paths = "/bin/api/user", extensions = "json")
public class UserServlet extends SlingSafeMethodsServlet {
public void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response) {
String suffix = request.getRequestPathInfo().getSuffix();
String[] split = StringUtils.split(suffix, '/');
// parse split path and check if the path is valid
// if path is not valid, send 404:
// response.sendError(HttpURLConnection.HTTP_NOT_FOUND);
}
}
The RESTful way to approach this would be to have the information stored in the structure that you want to use. i.e. /content/user/abc123/phone/555-klondike-5/history/ would contain all the history nodes for that path.
In that usage. you can obtain an out of the box json response by simply calling
/content/user/abc123/phone/555-klondike-5/history.json
Or if you need something in a specific json format you could use the sling resource resolution to use a custom json response.
Excited to share this! I've worked ~ a week solving this, finally have the best Answer.
First: Try to use Jersey
The osgi-jax-rs-connector suggested by kallada is best, but I couldn't get it working on Sling 8. I lost a full day trying, all I have to show for it are spooky class not found errors and dependency issues.
Solution: The ResourceProvider
Bertrand's link is for Sling 9 only, which isn't released. So here's how you do it in Sling 8 and older!
Two Files:
ResourceProvider
Servlet
The ResourceProvider
The purpose of this is only to listen to all requests at /service and then produce a "Resource" at that virtual path, which doesn't actually exist in the JCR.
#Component
#Service(value=ResourceProvider.class)
#Properties({
#Property(name = ResourceProvider.ROOTS, value = "service/image"),
#Property(name = ResourceProvider.OWNS_ROOTS, value = "true")
})
public class ImageResourceProvider implements ResourceProvider {
#Override
public Resource getResource(ResourceResolver resourceResolver, String path) {
AbstractResource abstractResource;
abstractResource = new AbstractResource() {
#Override
public String getResourceType() {
return TypeServlet.RESOURCE_TYPE;
}
#Override
public String getResourceSuperType() {
return null;
}
#Override
public String getPath() {
return path;
}
#Override
public ResourceResolver getResourceResolver() {
return resourceResolver;
}
#Override
public ResourceMetadata getResourceMetadata() {
return new ResourceMetadata();
}
};
return abstractResource;
}
#Override
public Resource getResource(ResourceResolver resourceResolver, HttpServletRequest httpServletRequest, String path) {
return getResource(resourceResolver , path);
}
#Override
public Iterator<Resource> listChildren(Resource resource) {
return null;
}
}
The Servlet
Now you just write a servlet which handles any of the resources coming from that path - but this is accomplished by handling any resources with the resource type which is produced by the ResourceProvider listening at that path.
#SlingServlet(
resourceTypes = TypeServlet.RESOURCE_TYPE,
methods = {"GET" , "POST"})
public class TypeServlet extends SlingAllMethodsServlet {
static final String RESOURCE_TYPE = "mycompany/components/service/myservice";
#Override
protected void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response) throws ServletException, IOException {
final String [] pathParts = request.getResource().getPath().split("/");
final String id = pathParts[pathParts.length-1];
response.setContentType("text/html");
PrintWriter out = response.getWriter();
try {
out.print("<html><body>Hello, received this id: " + id + "</body></html>");
} finally {
out.close();
}
}
}
Obviously your servlet would do something much more clever, such as process the "path" String more intelligently and probably produce JSON.
When I want to download text file(name is demo.txt) using RestFul WebService and jersy and access it via then I got the following error:
HTTP Status 500 - c:\demo.txt (The system cannot find the file specified) while I have demo.txt in C: drive
my code is:
#Path("/file")
public class FileService {
#GET
#Path("/download")
#Produces("text/plain")
public Response getFile(){
File file=new File("c:\\demo.txt");
ResponseBuilder builder=Response.ok((Object)file);
builder.header("Content-Disposition","attachment; filename=\"test1.txt\"");
return builder.build();
}
}
Please help me thanks in advance
I was going around the same issue few days ago.
The best thing to do is convert the file in a byte [], something like
byte[] buffer = IOUtils.toByteArray(is);
where 'is' is the input stream object of the file you want to download and then replace your code like this :
#Path("/file")
public class FileService {
#GET
#Path("/download")
#Produces("text/plain")
public Response getFile(){
ResponseBuilder builder=Response.ok((Object)buffer);
builder.header("Content-Disposition","attachment; filename=\"test1.txt\"");
return builder.build();
}
}
This works. try and let me know.
I am trying to implement REST Service using XPage REST Service Control. I have opted for "customRESTService".
I would like to emit JSON when this service is requested. I can write logic in Server Side Java Script.
But I noticed that this customRESTService also supports "serviceBean", meaning I can write whole logic in pure JAVA.
I have given below code of the bean. I have declared it in faces-config.xml as well. But it throws exception while rendering. Has anyone used "serviceBean" in customRESTService?
I appreciate any help!! Thanks!!
public class GetApproverJSON{
public GetApproverJSON(){
System.out.println("Instantiating Bean");
}
public String doGet() throws NotesException{
JSONObject mainObj = new JSONObject();;
JSONObject itemObj;
try{
mainObj.put("label", "name");
mainObj.put("identifier", "abbr");
itemObj = new JSONObject();
itemObj.put("name", "");
itemObj.put("abbr", "");
mainObj.accumulate("items", itemObj);
return mainObj.toString();
}catch(Exception e){
System.out.println("Exception occured while generating JSON ");
e.printStackTrace();
return mainObj.toString();
}finally{
}
}
Error :
com.ibm.domino.services.ServiceException: Error while rendering service
at com.ibm.xsp.extlib.component.rest.CustomService$ScriptServiceEngine.renderService(CustomService.java:304)
at com.ibm.domino.services.HttpServiceEngine.processRequest(HttpServiceEngine.java:167)
at com.ibm.xsp.extlib.component.rest.UIBaseRestService._processAjaxRequest(UIBaseRestService.java:252)
at com.ibm.xsp.extlib.component.rest.UIBaseRestService.processAjaxRequest(UIBaseRestService.java:229)
at com.ibm.xsp.util.AjaxUtilEx.renderAjaxPartialLifecycle(AjaxUtilEx.java:206)
at com.ibm.xsp.webapp.FacesServletEx.renderAjaxPartial(FacesServletEx.java:221)
at com.ibm.xsp.webapp.FacesServletEx.serviceView(FacesServletEx.java:166)
at com.ibm.xsp.webapp.FacesServlet.service(FacesServlet.java:160)
at com.ibm.xsp.webapp.FacesServletEx.service(FacesServletEx.java:137)
at com.ibm.xsp.webapp.DesignerFacesServlet.service(DesignerFacesServlet.java:103)
at com.ibm.designer.runtime.domino.adapter.ComponentModule.invokeServlet(ComponentModule.java:576)
at com.ibm.domino.xsp.module.nsf.NSFComponentModule.invokeServlet(NSFComponentModule.java:1267)
at com.ibm.designer.runtime.domino.adapter.ComponentModule$AdapterInvoker.invokeServlet(ComponentModule.java:847)
at com.ibm.designer.runtime.domino.adapter.ComponentModule$ServletInvoker.doService(ComponentModule.java:796)
at com.ibm.designer.runtime.domino.adapter.ComponentModule.doService(ComponentModule.java:565)
at com.ibm.domino.xsp.module.nsf.NSFComponentModule.doService(NSFComponentModule.java:1251)
at com.ibm.domino.xsp.module.nsf.NSFService.doServiceInternal(NSFService.java:598)
at com.ibm.domino.xsp.module.nsf.NSFService.doService(NSFService.java:421)
at com.ibm.designer.runtime.domino.adapter.LCDEnvironment.doService(LCDEnvironment.java:341)
at com.ibm.designer.runtime.domino.adapter.LCDEnvironment.service(LCDEnvironment.java:297)
at com.ibm.domino.xsp.bridge.http.engine.XspCmdManager.service(XspCmdManager.java:272)
Caused by: com.ibm.xsp.FacesExceptionEx: Bean getApproverJSON is not a CustomServiceBean
at com.ibm.xsp.extlib.component.rest.CustomService.findBeanInstance(CustomService.java:226)
at com.ibm.xsp.extlib.component.rest.CustomService$ScriptServiceEngine.renderService(CustomService.java:255)
... 20 more
You need to change your code to:
public class GetApproverJSON{ ...}
to:
public class GetApproverJSON extends CustomServiceBean {
#Override
public void renderService(CustomService service, RestServiceEngine engine) throws ServiceException {
HttpServletRequest request = engine.getHttpRequest();
HttpServletResponse response = engine.getHttpResponse();
response.setHeader("Content-Type", "application/json; charset=UTF-8");
// Here goes your code, get the response writer or stream
}
since that's the interface the REST service is expecting. You will need to implement just renderService. You can get the method (GET, POST etc.) from the request object
I've never used the service bean before, I usually create my own parser with a static doGet method very similar to yours and in the doGet property of the custom REST service make a call to the static doGet method I create. But I think (I'm probably wrong on this count) if you use the service bean it has to be an entire servlet like if you wrote your own actual REST Service, and not just the parser portion.
I've created quite a few of the parsers and have found that a list of maps:
List>
is usually the best approach for building the initial data. I then loop through the list to build my JSON. In the Extension Library there is a class called JsonWriter which makes it very easy to build a JSON Object. Use the JsonWriter like:
StringWriter sw = new StringWriter();
JsonWriter jw = new JsonWriter(sw);
jw.startObject();
jw.startProperty("SomeProperty");
jw.outStringLiteral("SomeValue");
jw.endProperty();
jw.endObject();
return sw.toString();
For a full on example you can take a look at the REST service I built for my JQuery FullCalendar demo. While none of the methods are static (I need to track a couple of properties) you should get the basic idea. But what kicks the whole thing off is a call to the writeJson() method. That is invoked in this custom control.
Those examples should get you going on building your own custom JSON parser and emitting that JSON back to your application.