Next Startup Script

[Sherlene Holloman]

Imagine there is a function (foo) provided by a third-party package (awesome-pkg) that needs to be called when the Next.js server is starting up and this foo function is using Node.js specific module so it cannot be called directly on the client side because that will lead to errors related to Module Not Found.

But setting up a custom server has some drawbacks that should be considered before deciding to use it. One of the main disadvantages is that it can remove some of the default optimizations provided by Next.js. For instance, serverless functions and Automatic Static Optimization (ASO) might not be available in a custom server, which can lead to decreased performance and slower load times.

However, this approach is more of a workaround and it won't exactly be calling the foo function at the Next.js server startup. Another problem with this implementation is that it can result in multiple API calls, which can be problematic if a large number of users are using the application. To avoid this issue, some additional logic will need to be added to ensure that the foo function is only called once.

The most preferred way to execute the foo function only when the Next.js server's starting up is by writing the logic in the next.config.js file. However, since the next config can be loaded in different lifecycles/phases of Next.js, it's important to specifically target the phase when the server is starting up. To achieve this, the constants provided by the Next.js team in next/constants (defined here) can be used which will make the next.config.js file look something like this:

In this article, we explored various ways to call a third-party package function during Next.js server startup. We started by discussing the common error of module not found that can occur when trying to call a function on the client side that uses Node.js specific modules. We then looked at three possible solutions to this problem.

The second solution was to expose an API endpoint and call the function inside the endpoint's handler. However, this solution could result in multiple API calls, which may not be ideal for large-scale applications.

Finally, we discussed the third solution of writing the logic in the next.config.js file to ensure that the code runs only during the Next.js server's startup phase. This approach can avoid unnecessary API calls and performance issues and ensure that the code runs only when the server is starting up.

I'd like to schedule a command to run after reboot on a Linux box. I know how to do this so the command consistently runs after every reboot with a @reboot crontab entry, however I only want the command to run once. After it runs, it should be removed from the queue of commands to run. I'm essentially looking for a Linux equivalent to RunOnce in the Windows world.

Now place any script you want run at the next reboot (once only) in the directory /etc/local/runonce.d and chown and chmod +x it appropriately. Once it's been run, you'll find it moved to the ran subdirectory and the date and time appended to its name. There will also be an entry in your syslog.

This will run the script on boot, as soon as the 'atd' service is up and running. If you need to delay the script while other things finish starting up, like a web server or something, you can include that in your script. For example:

Adapting solutions from @kaffeslangen, @geotheory and @CameronKerr, below is one that I used at the end of a VM bootstrapping script. The build script is executed via cloud-init on a new EC2 instance from an Ubuntu AMI. It installs and configures a bunch of stuff on first boot, and then reboots the system ready for use.

I wanted to send an email after the reboot with the status of the server and the log output from the build process, but only after the system has fully completed booting (otherwise the systemctl status command's output indicates a 'Starting' status and we don't yet know whether the system fully booted without other service failures). Hence the use of the 'at' command below.

Also, since my VM otherwise does not use /etc/rc.local, I can simply write it and then self-delete it, rather than creating a separate script and adding/removing an invocation for that within /etc/rc.local, as was done by @kaffeslangen.

... to manipulate the addin.jmpcust file. However the menu seems to load before the script is executed - so you need to restart jmp again for seeing the changes.

So my question: Is there a way to refresh/update the main menu, or maybe a better possibility to achieve my goal?

I developed a large system of Addins(when I was a worker bee, and not a senior golfer) that automatically kept the Addins updated. What I found was that copying the JSL etc. into the Addins directory was very fast, and that what I ended up doing, was setting up the Addins to always copy the JSL from the global repository into Addins directory, and then run the JSL. I did not have to ask the users to reinstall, and the users always had the latest code. It really simplified the administration.

I now check within my addinLoad.jsl file if/how the menu item should be changed and edit my ".jmpcust" file.
Afterwards I send a CMD to start/execute my .jsl file showed above -> the menu items are getting updated on startup.

What I am attempting to do is create a script that will allow me to manually annotate the regions that I want classified, then run cell detection, classify the results, export the results, and then open the next image in the project

You might also want to look into changing the use of Swing to JavaFX, although this will require using Platform.runLater(). In the end, UI stuff needs to be handled in a particular thread for both Swing and JavaFX but JavaFX is a bit stricter in forcing the programmer to remember to do it.

In case it helps, the image prompt can also be avoided in the Preferences, though I suppose if this is intended for new users installing the software on their own, they might not be expected to know to set the preference.
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Neat script, though. Could definitely be adapted for people who want a pathologist to give manual analysis of a data set. Looking forward to the pixel classifier for the automatic annotation of fluorescent image tissue.

Apologies for breaking open an old thread. But I was interested in using this script, to send my downsampled image to imagej, do some manual actions there and then return to qupath to and go to the next screen. However, both the dialog and batch processing pop-up seem to block any manual action I want to make.

However, this works only for Node.js scripts. When implementing any larger site, you typically use TypeScript, and when we use it for the main site, we want to continue this trend in pre-build scripts too.

On our site, we used to define the pre-build scripts manually in package.json, but as we were adding more of them, the pre-build script line got really long and became hard to maintain. For that reason, we wanted to automate the process and added the runner.

Now, to be able to run these scripts in an automated way, we need to define some rules the scripts have to follow so we can keep adding new scripts without having to adjust the runner code. This is the basic frame for them:

This script is executed by the pre-build scripts runner, fetches all historically used URL slugs from content, transforms it into the structure requested by Next.js, and saves everything as a JSON file that is available to Next.js config during build time.

In this article, I showed you how pre-build scripts can be useful in building your Next.js site. And indeed, every now and then, while implementing functionality on our own site, we leverage this simple concept of pre-fetching data. I explained some of the most common use-cases and shared the full code of a script runner that can be executed before the actual next build to process all needed tasks.

Before you run your application, add the newrelic.js AMP agent configuration file to the root directory of your project. Remember to add app_name and license_key values to the file. For more information, see an example config file for your Next.js app.

The next code snippet, which you can also see in GitHub, shows the _document.tsx file. You can use it to update the HTML tags (like , ) that are used to render a Next.js page. In this case, you need to modify the tag of the document by injecting the New Relic browser agent script.

This tells the Node APM agent to forward all application logs and automatically link them to spans, traces, and other telemetry data. You can make additional adjustments to the configuration, too, such as limiting the maximum number of logs sent to New Relic.

The best way to integrate with the Winston logging framework is to write a simple component that can be used across your application in different files. It can look as simple as this Logger.tsx example.

The views expressed on this blog are those of the author and do not necessarily reflect the views of New Relic. Any solutions offered by the author are environment-specific and not part of the commercial solutions or support offered by New Relic. Please join us exclusively at the Explorers Hub (discuss.newrelic.com) for questions and support related to this blog post. This blog may contain links to content on third-party sites. By providing such links, New Relic does not adopt, guarantee, approve or endorse the information, views or products available on such sites.

Startup scripts can perform initialization tasks that cannot be handled by command line options or ordinary configuration options, such as customizing jEdit's user interface by changing entries in the Java platform's UIManager class.

Startup scripts have an additional feature lacking in ordinary macros that can help you further customize jEdit. Variables and methods defined in a startup script are available in all instances of the BeanShell interpreter created in jEdit. This allows you to create a personal library of methods and objects that can be accessed at any time during the editing session in another macro, the BeanShell shell of the Console plugin, or menu items such as Utilities>BeanShell>Evaluate BeanShell Expression.

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