In a Java application, I have a situation where I need a circuit for a period of time. Using a Hystrix Dashboard, listening to the /hystrix.stream, I'm able to see the circuit created just fine. The problem is when the circuit is not longer needed, it still shows up in the dashboard. I'd like to just delete the circuit. The dashboard is getting cluttered with circuits that are no longer relevant. Any ideas?
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I have several HTTP callouts that are in a schedulable and set to run ever hour or so. After I deployed the app on the app exchange and had a salesforce user download it to test, it seems the jobs are not executing.
I can see the jobs are being scheduled to run accordingly however the database never seems to change. Is there any reason this could be happening or is there a good chance the flaw lies in my code?
I was thinking that it could be permissions however I am not sure (its the first app I am deploying).
Check if the organisation of your end user has added your endpoint to "remote site settings" in the setup. By endpoint I mean an address that's being called (or just the domain).
If the class is scheduled properly (which I believe would be a manual action, not just something that magically happens after installation... unless you've used a post-install script?) you could also examine Setup -> Apex Jobs and check if there are any errors. If I'm right, there will be an error about callout not allowed due to remote site settings. If not - there's still a chance you'll see something that will make you think. For example batch job has executed successfully but there were 0 iterations -> problem?
Last but not least - you can always try the debug logs :) Enable them in Setup (or open the developer console), fire the scheduled class's execute() manually and observe the results? How to fire it manually? Sth like this pasted to "execute anonymous":
MySchedulableClass sched = new MySchedubulableClass();
sched.execute(null);
Or - since you know what's inside the scheduled class - simply experiment.
Please note that if the updates you might be performing somehow violate for example validation rules your client has - yes, the database will be unchanged. But in such case you should still be able to see failures in Setup -> Apex Jobs.
I have been getting an intermittent problem using the App Engine channel API. For the most, maybe 90% of the time, everything works fine. But the remaining 10% of the time I get a channel that is unusable. Having looked at this code for months, I strongly believe that this problem is not due to a logical error. By unusable channel I mean that even though the client connects to it successfully, the server is not able to message it. Most of the operations involved on the client and server complete successfully:
On the server, I create a channel with a new client id unique to the session
The client fetches the corresponding token and connects to it
On the client, onOpen() is called on the channel socket
The one thing that doesn't succeed is the calling of /_ah/channel/connected for these defective channels. I've tried dozens of possible workarounds without success. Right now I deal with the problem by gracefully retrying till I succeed, but it would be really nice for it to work without these tricks.
I havent seen any code but from what you are saying could it be related to
Intermittent error code 400, description “” on client connecting to channel
I am using a kind of brute force loop messaging to all client sockets (even if they have been closed, its a bit redundant but the overhead seems low ) and haven't picked up any problems yet (I also havent tested it that well either)
It seems that they fixed a leak in the channels APi in the last release 1.8.2: https://code.google.com/p/googleappengine/issues/detail?id=9283
https://code.google.com/p/googleappengine/wiki/SdkForJavaReleaseNotes
I coded a simple scraper , who's job is to go on several different pages of a site. Do some parsing , call some URL's that are otherwise called via AJAX , and store the data in a database.
Trouble is , that sometimes my ip is blocked after my scraper executes. What steps can I take so that my ip does not get blocked? Are there any recommended practices? I have added a 5 second gap between requests to almost no effect. The site is medium-big(need to scrape several URLs)and my internet connection slow, so the script runs for over an hour. Would being on a faster net connection(like on a hosting service) help ?
Basically I want to code a well behaved bot.
lastly I am not POST'ing or spamming .
Edit: I think I'll break my script into 4-5 parts and run them at different times of the day.
You could use rotating proxies, but that wouldn't be a very well behaved bot. Have you looked at the site's robots.txt?
Write your bot so that it is more polite, i.e. don't sequentially fetch everything, but add delays in strategic places.
Following guidelines set in robots.txt is a good first step. There are tools such as import.io and morph.io. There are also packages/ plugins for servers. For example x-ray; a node.js which have options to assist in quickly writing responsible scrapers e.g. throttle, delays, max connections etc.
following on from this question:
GWT detect GAE version changes and reload
I would like to further clarify some things.
I have an enterprise app (GWT 2.4 & GAEJ 1.6.4 - using GWT-RPC) that my users typically run all day in their browsers, indeed some don't bother refreshing the browser from day to day. I make new releases on a pretty regular basis, so am trying to streamline the process for minimal impact to my users. - Not all releases concern all users, so I'd like to minimize the number of restarts.
I was hoping it might be possible to do the following. Categorize my releases as follows:
1) releases that will cause an IncompatibleRemoteServiceException to be thrown
and 2) those that don't : i.e. only affect the server, or client but not the RPC interface.
Then I could make lots of changes to the client and server without affecting the interface between the two. As long as I don't make a modification to the RPC interface, presumably I can change server code and or client code and the exception won't be thrown? Right? or will any redeployment of GAE cause an old client to get an IncompatibleRemoteServiceException ?
If I was able to do that I could batch up interface busting changes into fairly infrequent releases and notify my users a restart will be required.
many thanks for any help.
I needed an answer pretty quick so I thought I'd just do some good old fashioned testing to see what's possible. Hopefully this will be useful for others with production systems using GWT-RPC.
Goal is to be able to release updates / fixes without requiring all connected browsers to refresh. Turns out there is quite a lot you can do.
So, after my testing, here's what you can and can't do:
no problem
add a new call to a RemoteService
just update some code on the server e.g. simple bug fix, redeploy
just update some client (GWT) code and redeploy (of course anyone wanting new client functionality will have to refresh browser, but others are unaffected)
limited problems
add a parameter to an existing RemoteService method - this one is interesting, that particular call will throw "IncompatibleRemoteServiceException" (of course) but all others calls to the same Remote Service or other Remote Services (Impl's) are unaffected.
Add a new type (as a parameter) to any method within a RemoteService - this is the most interesting one, and is what led me to do this testing. It will render that whole RemoteService out of date for existing clients with IncompatibleRemoteServiceException. However you can still use other RemoteServices. - I need to do some more testing here to fully understand or perhaps someone else knows more?
so if you know what you're doing you can do quite a lot without having to bother your users with refreshes or release announcements.
This is driving me nuts.
I'm making a SSH Tunnelling application, and need to be able to automatically force the system to use HTTP & Socks5 proxies, and have the changes take effect instantly.
HTTP proxies are now taken care of perfectly by the PoshHTTP class , but I can't figure out how to do the same with SOCKS5.
I've already tried forcing the changes in the registry, but they don't take effect instantly and it's just not reliable. In most cases I had to open internet options > lan settings before the settings would take effect, so the user may as well have set the proxy up manually by this point.
Is there a way to do this that I'm missing ? It would be amazing if I could just modify poshHTTP to do this, but I don't have high hopes.
Please help.. I did search like mad for days before posting but I'm running out of ideas and this app needs to be launched ASAP. Thanks!
I'm willing to Pay $50USD for a workable c# solution, that takes effect immediately (Paid via PayPal only)
That really dependes on what kind of socks5 authentication type it's required
have youtried this? http://code.msdn.microsoft.com/windowsdesktop/CSWebBrowserWithProxy-c8535715#content
Other places you could look at are http://www.codeproject.com/Articles/336/SOCKS-Proxy-SSL-Tunnel and http://www.codeproject.com/Articles/5954/C-class-for-connecting-via-a-SOCKS5-Proxy-Server