Project WONDER

Have a look at didInsert and didUpdate on ERXGenericRecord.

Ramsey

On Jan 13, 2011, at 10:36 PM, Jesse Tayler wrote:

> 
> I'd like to trigger some events post-save, and I'd typically do this by listening to EOEditingContext didSave notification and look through the objects for any I'm interested in.
> 
> I wonder if there's a WOnder methodology I should check out?
> 
> I need to trigger a thumbnail generating unix script after an attachments saves to S3, this requires the final primaryKey.
> 
> Any advice for what simplest/most WOnder'ish ?
> 
> 
> 
> 
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Overide ERXGenericRecord.didInsert and didUpdate in your EOs. 

Regards, Kieran.
(Sent from my iPhone)


On Jan 13, 2011, at 10:36 PM, Jesse Tayler <jtayler@...> wrote:

> 
> I'd like to trigger some events post-save, and I'd typically do this by listening to EOEditingContext didSave notification and look through the objects for any I'm interested in.
> 
> I wonder if there's a WOnder methodology I should check out?
> 
> I need to trigger a thumbnail generating unix script after an attachments saves to S3, this requires the final primaryKey.
> 
> Any advice for what simplest/most WOnder'ish ?
> 
> 
> 
> 
> ------------------------------------------------------------------------------
> Protect Your Site and Customers from Malware Attacks
> Learn about various malware tactics and how to avoid them. Understand 
> malware threats, the impact they can have on your business, and how you 
> can protect your company and customers by using code signing.
> http://p.sf.net/sfu/oracle-sfdevnl
> _______________________________________________
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should I be using my own subclass of ERAttachment in order to hear didInsert after the attachment gets saved?


On Jan 13, 2011, at 10:48 PM, Kieran Kelleher wrote:

> Overide ERXGenericRecord.didInsert and didUpdate in your EOs. 
> 
> Regards, Kieran.
> (Sent from my iPhone)
> 
> 
> On Jan 13, 2011, at 10:36 PM, Jesse Tayler <jtayler@...> wrote:
> 
>> 
>> I'd like to trigger some events post-save, and I'd typically do this by listening to EOEditingContext didSave notification and look through the objects for any I'm interested in.
>> 
>> I wonder if there's a WOnder methodology I should check out?
>> 
>> I need to trigger a thumbnail generating unix script after an attachments saves to S3, this requires the final primaryKey.
>> 
>> Any advice for what simplest/most WOnder'ish ?
>> 
>> 
>> 
>> 
>> ------------------------------------------------------------------------------
>> Protect Your Site and Customers from Malware Attacks
>> Learn about various malware tactics and how to avoid them. Understand 
>> malware threats, the impact they can have on your business, and how you 
>> can protect your company and customers by using code signing.
>> http://p.sf.net/sfu/oracle-sfdevnl
>> _______________________________________________
>> Wonder-disc mailing list
>> Wonder-disc@...
>> https://lists.sourceforge.net/lists/listinfo/wonder-disc
>

Oops, sorry. That was the "standard answer" for EO post-save events hooks.  ;-)

For the specific case of ERAttachment, you can probably tackle this with a IERAttachmentProcessorDelegate implementation for S3 storage type.
	
	public class JesseS3Delegate implements IERAttachmentProcessorDelegate


And them implement it in your startup logic with code that looks something like this:

		ERS3AttachmentProcessor myS3Processor = new ERS3AttachmentProcessor();
		myS3Processor.setDelegate(new JesseS3Delegate());
		ERAttachmentProcessor.addAttachmentProcessorForType(myS3Processor, ERS3Attachment.STORAGE_TYPE);


HTH, Kieran


On Jan 13, 2011, at 10:58 PM, Jesse Tayler wrote:

> should I be using my own subclass of ERAttachment in order to hear didInsert after the attachment gets saved?
> 
> 
> On Jan 13, 2011, at 10:48 PM, Kieran Kelleher wrote:
> 
>> Overide ERXGenericRecord.didInsert and didUpdate in your EOs. 
>> 
>> Regards, Kieran.
>> (Sent from my iPhone)
>> 
>> 
>> On Jan 13, 2011, at 10:36 PM, Jesse Tayler <jtayler@...> wrote:
>> 
>>> 
>>> I'd like to trigger some events post-save, and I'd typically do this by listening to EOEditingContext didSave notification and look through the objects for any I'm interested in.
>>> 
>>> I wonder if there's a WOnder methodology I should check out?
>>> 
>>> I need to trigger a thumbnail generating unix script after an attachments saves to S3, this requires the final primaryKey.
>>> 
>>> Any advice for what simplest/most WOnder'ish ?
>>> 
>>> 
>>> 
>>> 
>>> ------------------------------------------------------------------------------
>>> Protect Your Site and Customers from Malware Attacks
>>> Learn about various malware tactics and how to avoid them. Understand 
>>> malware threats, the impact they can have on your business, and how you 
>>> can protect your company and customers by using code signing.
>>> http://p.sf.net/sfu/oracle-sfdevnl
>>> _______________________________________________
>>> Wonder-disc mailing list
>>> Wonder-disc@...
>>> https://lists.sourceforge.net/lists/listinfo/wonder-disc
>> 
>

On Jan 14, 2011, at 7:30 AM, Kieran Kelleher wrote:

> Oops, sorry. That was the "standard answer" for EO post-save events hooks.  ;-)

Oh, yeah... oops (^_^)

> 
> For the specific case of ERAttachment, you can probably tackle this with a IERAttachmentProcessorDelegate implementation for S3 storage type.
> 	
> 	public class JesseS3Delegate implements IERAttachmentProcessorDelegate
> 
> 
> And them implement it in your startup logic with code that looks something like this:
> 
> 		ERS3AttachmentProcessor myS3Processor = new ERS3AttachmentProcessor();
> 		myS3Processor.setDelegate(new JesseS3Delegate());
> 		ERAttachmentProcessor.addAttachmentProcessorForType(myS3Processor, ERS3Attachment.STORAGE_TYPE);
> 
> 
> HTH, Kieran

I've wondered why that delegate is never passed the actual file attached.  Does this mean one needs to upload to S3, then turn right around and download it again in order to do post upload processing with the file itself?  

In my case I ended up creating a delegate interface of my own. Then I set the file on it in my custom upload component so I could get a handle to the file.  You can see the call currently at line 113.

https://r2d2w.svn.sourceforge.net/svnroot/r2d2w/trunk/ERR2d2w/Sources/er/r2d2w/components/R2D2WEditFile.java

It would be interesting to know if there's some other built-in way to do this. Obviously I haven't discovered one yet (^_^)

Ramsey

> 
> 
> On Jan 13, 2011, at 10:58 PM, Jesse Tayler wrote:
> 
>> should I be using my own subclass of ERAttachment in order to hear didInsert after the attachment gets saved?
>> 
>> 
>> On Jan 13, 2011, at 10:48 PM, Kieran Kelleher wrote:
>> 
>>> Overide ERXGenericRecord.didInsert and didUpdate in your EOs. 
>>> 
>>> Regards, Kieran.
>>> (Sent from my iPhone)
>>> 
>>> 
>>> On Jan 13, 2011, at 10:36 PM, Jesse Tayler <jtayler@...> wrote:
>>> 
>>>> 
>>>> I'd like to trigger some events post-save, and I'd typically do this by listening to EOEditingContext didSave notification and look through the objects for any I'm interested in.
>>>> 
>>>> I wonder if there's a WOnder methodology I should check out?
>>>> 
>>>> I need to trigger a thumbnail generating unix script after an attachments saves to S3, this requires the final primaryKey.
>>>> 
>>>> Any advice for what simplest/most WOnder'ish ?
>>>> 
>>>> 
>>>> 
>>>> 
>>>> ------------------------------------------------------------------------------
>>>> Protect Your Site and Customers from Malware Attacks
>>>> Learn about various malware tactics and how to avoid them. Understand 
>>>> malware threats, the impact they can have on your business, and how you 
>>>> can protect your company and customers by using code signing.
>>>> http://p.sf.net/sfu/oracle-sfdevnl
>>>> _______________________________________________
>>>> Wonder-disc mailing list
>>>> Wonder-disc@...
>>>> https://lists.sourceforge.net/lists/listinfo/wonder-disc
>>> 
>> 
> 
> 
> ------------------------------------------------------------------------------
> Protect Your Site and Customers from Malware Attacks
> Learn about various malware tactics and how to avoid them. Understand 
> malware threats, the impact they can have on your business, and how you 
> can protect your company and customers by using code signing.
> http://p.sf.net/sfu/oracle-sfdevnl
> _______________________________________________
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> Wonder-disc@...
> https://lists.sourceforge.net/lists/listinfo/wonder-disc

thanks guys -

I was able to check which key changed off User but this looks better.

Plus, I too wondered about S3 timing and that I'd have to get the image, process and upload again which works 'by hand' now.

For some reason, I'm having trouble launching the UNIX script, maybe something in here will help me figure what's up there or otherwise write the file to disk more efficiently -



On Jan 14, 2011, at 8:46 AM, Ramsey Lee Gurley wrote:
> I've wondered why that delegate is never passed the actual file attached.  Does this mean one needs to upload to S3, then turn right around and download it again in order to do post upload processing with the file itself?  
> 
> In my case I ended up creating a delegate interface of my own. Then I set the file on it in my custom upload component so I could get a handle to the file.  You can see the call currently at line 113.
> 
> https://r2d2w.svn.sourceforge.net/svnroot/r2d2w/trunk/ERR2d2w/Sources/er/r2d2w/components/R2D2WEditFile.java
> 
> It would be interesting to know if there's some other built-in way to do this. Obviously I haven't discovered one yet (^_^)
> 
> Ramsey
> 
>> 
>> 
>> On Jan 13, 2011, at 10:58 PM, Jesse Tayler wrote:
>> 
>>> should I be using my own subclass of ERAttachment in order to hear didInsert after the attachment gets saved?
>>> 
>>> 
>>> On Jan 13, 2011, at 10:48 PM, Kieran Kelleher wrote:
>>> 
>>>> Overide ERXGenericRecord.didInsert and didUpdate in your EOs. 
>>>> 
>>>> Regards, Kieran.
>>>> (Sent from my iPhone)
>>>> 
>>>> 
>>>> On Jan 13, 2011, at 10:36 PM, Jesse Tayler <jtayler@...> wrote:
>>>> 
>>>>> 
>>>>> I'd like to trigger some events post-save, and I'd typically do this by listening to EOEditingContext didSave notification and look through the objects for any I'm interested in.
>>>>> 
>>>>> I wonder if there's a WOnder methodology I should check out?
>>>>> 
>>>>> I need to trigger a thumbnail generating unix script after an attachments saves to S3, this requires the final primaryKey.
>>>>> 
>>>>> Any advice for what simplest/most WOnder'ish ?
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> ------------------------------------------------------------------------------
>>>>> Protect Your Site and Customers from Malware Attacks
>>>>> Learn about various malware tactics and how to avoid them. Understand 
>>>>> malware threats, the impact they can have on your business, and how you 
>>>>> can protect your company and customers by using code signing.
>>>>> http://p.sf.net/sfu/oracle-sfdevnl
>>>>> _______________________________________________
>>>>> Wonder-disc mailing list
>>>>> Wonder-disc@...
>>>>> https://lists.sourceforge.net/lists/listinfo/wonder-disc
>>>> 
>>> 
>> 
>> 
>> ------------------------------------------------------------------------------
>> Protect Your Site and Customers from Malware Attacks
>> Learn about various malware tactics and how to avoid them. Understand 
>> malware threats, the impact they can have on your business, and how you 
>> can protect your company and customers by using code signing.
>> http://p.sf.net/sfu/oracle-sfdevnl
>> _______________________________________________
>> Wonder-disc mailing list
>> Wonder-disc@...
>> https://lists.sourceforge.net/lists/listinfo/wonder-disc
> 
>

Instead of, or in addition to, a delegate, you can possibly subclass ERS3AttachmentProcessor, and subclass the ERS3UploadQueue, then override the constructor of ERS3AttachmentProcessor to use your ERS3UploadQueue subclass.

Then override ERS3UploadQueue.process(ERS3QueueEntry) method to do what you want.

...... or some variation of that ....., maybe just create your own S3 processor class by copying and modifying the current one.

Either way, Mike made it pretty flexible since you can install your own custom processors for specific types at startup:

	ERAttachmentProcessor.addAttachmentProcessorForType(myS3Processor, ERS3Attachment.STORAGE_TYPE);

HTH,

Kieran


On Jan 14, 2011, at 10:15 AM, Jesse Tayler wrote:

> thanks guys -
> 
> I was able to check which key changed off User but this looks better.
> 
> Plus, I too wondered about S3 timing and that I'd have to get the image, process and upload again which works 'by hand' now.
> 
> For some reason, I'm having trouble launching the UNIX script, maybe something in here will help me figure what's up there or otherwise write the file to disk more efficiently -
> 
> 
> 
> On Jan 14, 2011, at 8:46 AM, Ramsey Lee Gurley wrote:
>> I've wondered why that delegate is never passed the actual file attached.  Does this mean one needs to upload to S3, then turn right around and download it again in order to do post upload processing with the file itself?  
>> 
>> In my case I ended up creating a delegate interface of my own. Then I set the file on it in my custom upload component so I could get a handle to the file.  You can see the call currently at line 113.
>> 
>> https://r2d2w.svn.sourceforge.net/svnroot/r2d2w/trunk/ERR2d2w/Sources/er/r2d2w/components/R2D2WEditFile.java
>> 
>> It would be interesting to know if there's some other built-in way to do this. Obviously I haven't discovered one yet (^_^)
>> 
>> Ramsey
>> 
>>> 
>>> 
>>> On Jan 13, 2011, at 10:58 PM, Jesse Tayler wrote:
>>> 
>>>> should I be using my own subclass of ERAttachment in order to hear didInsert after the attachment gets saved?
>>>> 
>>>> 
>>>> On Jan 13, 2011, at 10:48 PM, Kieran Kelleher wrote:
>>>> 
>>>>> Overide ERXGenericRecord.didInsert and didUpdate in your EOs. 
>>>>> 
>>>>> Regards, Kieran.
>>>>> (Sent from my iPhone)
>>>>> 
>>>>> 
>>>>> On Jan 13, 2011, at 10:36 PM, Jesse Tayler <jtayler@...> wrote:
>>>>> 
>>>>>> 
>>>>>> I'd like to trigger some events post-save, and I'd typically do this by listening to EOEditingContext didSave notification and look through the objects for any I'm interested in.
>>>>>> 
>>>>>> I wonder if there's a WOnder methodology I should check out?
>>>>>> 
>>>>>> I need to trigger a thumbnail generating unix script after an attachments saves to S3, this requires the final primaryKey.
>>>>>> 
>>>>>> Any advice for what simplest/most WOnder'ish ?
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> ------------------------------------------------------------------------------
>>>>>> Protect Your Site and Customers from Malware Attacks
>>>>>> Learn about various malware tactics and how to avoid them. Understand 
>>>>>> malware threats, the impact they can have on your business, and how you 
>>>>>> can protect your company and customers by using code signing.
>>>>>> http://p.sf.net/sfu/oracle-sfdevnl
>>>>>> _______________________________________________
>>>>>> Wonder-disc mailing list
>>>>>> Wonder-disc@...
>>>>>> https://lists.sourceforge.net/lists/listinfo/wonder-disc
>>>>> 
>>>> 
>>> 
>>> 
>>> ------------------------------------------------------------------------------
>>> Protect Your Site and Customers from Malware Attacks
>>> Learn about various malware tactics and how to avoid them. Understand 
>>> malware threats, the impact they can have on your business, and how you 
>>> can protect your company and customers by using code signing.
>>> http://p.sf.net/sfu/oracle-sfdevnl
>>> _______________________________________________
>>> Wonder-disc mailing list
>>> Wonder-disc@...
>>> https://lists.sourceforge.net/lists/listinfo/wonder-disc
>> 
>> 
> 
> 
> ------------------------------------------------------------------------------
> Protect Your Site and Customers from Malware Attacks
> Learn about various malware tactics and how to avoid them. Understand 
> malware threats, the impact they can have on your business, and how you 
> can protect your company and customers by using code signing.
> http://p.sf.net/sfu/oracle-sfdevnl
> _______________________________________________
> Wonder-disc mailing list
> Wonder-disc@...
> https://lists.sourceforge.net/lists/listinfo/wonder-disc

On Jan 14, 2011, at 10:36 AM, Kieran Kelleher wrote:

> Either way, Mike made it pretty flexible since you can install your own custom processors for specific types at startup:
> 
> 	ERAttachmentProcessor.addAttachmentProcessorForType(myS3Processor, ERS3Attachment.STORAGE_TYPE);

Gosh, sounds like I should make an S3ThumbnailingProcessor  --

Now I'm between two methods, calling a script and making a processor.

I have a simple shell script that gets the S3 file, generates a few thumbs, then uploads and cleans up which I had planned to just call with the filename as argument.

I just wrote out java.io  calls to UNIX, but I never got the WOApp to actually execute the script quite yet:

   public void callUnixProcess(String ex) {
       System.out.println("callUnixProcess " + "[" + ex + "]");
       Runtime imageProcess=null;
       try {
           imageProcess = Runtime.getRuntime();
           Process m;
           int c=0;
           m = imageProcess.exec(ex);
           OutputStream imageProcessOutput =  m.getOutputStream();
           m.waitFor();
           BufferedInputStream bis=new BufferedInputStream(m.getInputStream());
           //printLineOutput("\n");
           while(c!=-1) {
               c=bis.read();
               System.out.print("#");
           }
           //printLineOutput("\n");
           m=null;
           bis.close();
       } catch (Exception exe) {
           exe.printStackTrace();
       }
   }


It might be more reliable and useful to others if I just make a ThumbnailingS3AttachmentProcessor, but I had a bit of trouble there too.

In my application launch I might put:

		ERAttachmentProcessor.addAttachmentProcessorForType(ThumbnailingS3AttachmentProcessor, ERS3Attachment.STORAGE_TYPE);

But I'm confused, is that first argument the class name? ThumbnailingS3AttachmentProcessor? That doesn't want an instance of ThumbnailingS3AttachmentProcessor?




Then maybe I stub out a quick subclass and override, something like this? I don't need any argument to call super?




import java.io.File;
import com.webobjects.eocontrol.EOEditingContext;
import er.attachment.model.ERS3Attachment;
import er.attachment.processors.ERS3AttachmentProcessor;
import er.extensions.concurrency.ERXAsyncQueue;
import er.extensions.eof.ERXEC;

public class ThumbnailingS3AttachmentProcessor extends ERS3AttachmentProcessor {
	
	public class ThumbnailingS3UploadQueue extends ERS3UploadQueue {
		private EOEditingContext _editingContext;

		public ThumbnailingS3UploadQueue() {
			super();
			_editingContext = ERXEC.newEditingContext();
		}

		public void process(ERS3QueueEntry object) {
			ERS3Attachment attachment = object.attachment();
			File uploadedFile = object.uploadedFile();
			//write files?
		}
	}
}

On Jan 15, 2011, at 6:30 PM, Mark Wardle wrote:

> Do you simply need the primary key that the newly created object will have once saved or have I misunderstood your question?


Thanks!

What I've done for now, is called a unix process with the primary key in an argument by watching if the user class changes the key for the photo from the snapshot during willUpdate.

The script will fetch the file from S3 and do some imagemagick on it, and upload back again -- this is currently functional, and the sharpening quality is great - but the implementation is kludgy.

http://s3.amazonaws.com/mtly/27-150.png

I suspect I should get my mostly working S3ThumbnailingImageProcessor complete. That would write the file onto disk, and handle the S3 uploads after ImageMagick is done, but I'm still chipping away on that.

I'll report back of that ends up working well, and if it seems like something useful to others setting up thumnailing of various sort.

Do you simply need the primary key that the newly created object will have
once saved or have I misunderstood your question?

If so, see er.extensions.ERXEnterpriseObject#primaryKeyInTransaction()

Mark

On 14 January 2011 03:36, Jesse Tayler <jtayler@...> wrote:

>
> I'd like to trigger some events post-save, and I'd typically do this by
> listening to EOEditingContext didSave notification and look through the
> objects for any I'm interested in.
>
> I wonder if there's a WOnder methodology I should check out?
>
> I need to trigger a thumbnail generating unix script after an attachments
> saves to S3, this requires the final primaryKey.
>
> Any advice for what simplest/most WOnder'ish ?
>
>
>
>
>
> ------------------------------------------------------------------------------
> Protect Your Site and Customers from Malware Attacks
> Learn about various malware tactics and how to avoid them. Understand
> malware threats, the impact they can have on your business, and how you
> can protect your company and customers by using code signing.
> http://p.sf.net/sfu/oracle-sfdevnl
> _______________________________________________
> Wonder-disc mailing list
> Wonder-disc@...
> https://lists.sourceforge.net/lists/listinfo/wonder-disc
>



-- 
Dr. Mark Wardle
Specialist registrar, Neurology
Cardiff, UK