EJB with rest to download service / update blob

Hello

I have successfully uses a rest service to present an image that is stored in my DB as a BLOB, but now I have to do the opposite, upload an image and save it as a blob, replacing the former or the addition of a new.

I thought that I could implement the same way I use to update other data as strings, numbers and dates:

    @POST
    @Consumes("application/xml")
    @Path("/merge/")
    public Response update(Customer customer) {
        
        Customer persistedCustomerRecord = SessionBean.getCustomerFindByRecId(customer.getRecid()).get(0);
        if (persistedCustomerRecord != null) {
        
            persistedCustomerRecord.setFname(customer.getFname());
            persistedCustomerRecord.setMname(customer.getMname());
            persistedCustomerRecord.setName(customer.getName());
            persistedCustomerRecord.setAnniversdate(customer.getAnniversdate());
      
            SessionBean.mergeCustomer(persistedCustomerRecord);
        } else {


            throw new ResourceNotFoundException("The employee resource with the id " + customer.getRecid() + "could not be found");
        }
        return Response.ok().build();
    }

but when I test my service entry for my memo field appears a base64Binary and is not a 'button' as the calendar to select the file.

With this in mind, I guess I have to somehow allow the download, select the file and convert byte [], since this is the data type defined by the EJB, creating the entity from the Table.

Am I wrong?

How can I accomplish this?

I use jdev 12 c and EJB

Thank you

Fixed.

My service now looks like this

    @POST
    @Consumes("application/xml")
    @Path("/merge/")
    public Response updatePhoto(Memos memo) {
        System.out.println("entrei " + memo.getSourceid());
        //find the employee record
        Memos persistedMemosRecord = SessionBean.getMemosUploadRecord(memo.getSourceid()).get(0);
        if (persistedMemosRecord != null) {
            System.out.println("no if, sourceid = " + persistedMemosRecord.getSourceid() + persistedMemosRecord.getRecid());
            //update employee object
            System.out.println("size " + memo.getThememo().length);
            persistedMemosRecord.setThememo(memo.getThememo());
            //persist the change
            SessionBean.mergeMemos(persistedMemosRecord);
        } else {

            throw new ResourceNotFoundException("The employee resource with the id " + memo.getRecid() + "could not be found");
        }
        return Response.ok().build();
    }

The xsd customer

And the bean of the jsf page

    public void fileUploaded(ValueChangeEvent event) {
        UploadedFile file = (UploadedFile) event.getNewValue();
        if (file != null) {
            BindingContainer bindings = BindingContext.getCurrent().getCurrentBindingsEntry();
            AttributeBinding attr = (AttributeBinding) bindings.getControlBinding("recid");
            String sourceid = attr.getInputValue().toString();

            FacesContext context = FacesContext.getCurrentInstance();
            FacesMessage message = new FacesMessage("Successfully uploaded file " + file.getFilename() + " (" + file.getLength() + " bytes)");
            context.addMessage(event.getComponent().getClientId(context), message);
            DCBindingContainer bc = (DCBindingContainer) BindingContext.getCurrent().getCurrentBindingsEntry();
            OperationBinding op = bc.getOperationBinding("updatePhoto");

            try {
                System.out.println("################# fileUpload op " + op);
                byte[] buffer = readFully(file.getInputStream());
                String encodedStr = new sun.misc.BASE64Encoder().encode(buffer);
                if (op != null) {
                    Map tempMap = new HashMap();

                    tempMap.put("thememo", encodedStr);
                    tempMap.put("sourceid", sourceid);
                    op.getParamsMap().put("memos", tempMap);
                    System.out.println("################ ja guardei no map str64 " + op.toString());
                    op.execute();
                }
            } catch (IOException e) {
                System.out.println(e);
            }
        }
    }

    /**
     *  Method to convert the InputStream to ByteArray
     */

    public byte[] readFully(InputStream input) throws IOException {
        byte[] buffer = new byte[8192];
        int bytesRead;
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        while ((bytesRead = input.read(buffer)) != -1) {
            output.write(buffer, 0, bytesRead);
        }
        return output.toByteArray();
    }

fileUpload is associated with a componente inputFile

Thanks for your help

Tags: Java

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EJB with Rest service to return a blob object

Hello
I worked with EJB and Services Rest and now I have this situation.
I'm trying to present an image saved on my DB as a BLOB, but when I test my service I get no results.
My entity like the following for the blob, auto generated code
```
private byte[] thememo;

    public byte[] getThememo() {
        return thememo;
    }

    public void setThememo(byte[] thememo) {
        this.thememo = thememo;
    }
```
and these are queries, both to return the same, I added
```
@NamedQuery(name = "Memos.findPhoto", query = "select o.thememo from Memos o where o.sourceid = :recid and o.memotyp = 101"),
@NamedQuery(name = "Memos.getPhoto", query = "select 'image/jpeg', o.thememo from Memos o where o.sourceid = :recid and o.memotyp = 101")
```
When you are looking for something that might explain to me on how to accomplish what I want, I found a link stating to add this "image/jpeg", before the column that as Creating RESTful Web Service for the recovery of the BLOB blob
and when I add these requests based on my SessionBean through façade are the results I get
```
    /** <code>select o.thememo from Memos o where o.sourceid = :recid and o.memotyp = 101</code> */
    @TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED)
    public List<Byte> getMemosFindPhoto(String recid) {
        return em.createNamedQuery("Memos.findPhoto", Memos.class).setParameter("recid", recid).getResultList();
    }

    /** <code>select 'image/jpeg', o.thememo from Memos o where o.sourceid = :recid and o.memotyp = 101</code> */
    @TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED)
    public List<Object[]> getMemosGetPhoto(String recid) {
        return em.createNamedQuery("Memos.getPhoto", Memos.class).setParameter("recid", recid).getResultList();
    }
```
The first gives me a list of bytes and the other a list of array of objects, and the only thing I want to come back is the blob as an image.
The two statements in my SessionBean are errors, "Incompatible Types" but this has been generated.
Without these functions, when I try to add the service to my JAXB schema it will not allow him.
What am I doing wrong, or that I lack I?
I use JDev 12.1.3.0
Thank you
and when I add "image/jpeg", "image/jpeg","image/jpeg",

Well, you can create new named queries or change existing, what corresponds to your use case.

For example, you can change

@NamedQuery (name = "Memos.findPhoto", query = "" select memos o where o.sourceid = o.thememo: o.memotyp and recid = 101 "").

TO:

@NamedQuery (name = "Memos.findPhoto", query = "" select o o memos where o.sourceid =: recid and o.memotyp = 101 "").

Then use the strongly typed named query (em.createNamedQuery ("Memos.findPhoto", Memos.class)) for map results to your entity of memos.

Or you can use @NamedQuery which returns only your image (but then you must use createNamedQuery() with a parameter).

After that, you can add the new method to your interface (or modify existing)

etc.

Dario

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