September 5, 2016 | Written by: Evan Compton
Categorized: Community | Compute Services | Mobile
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Disclaimer: IBM Cloud Tools for Swift (ICT) is no longer supported. Check out IBM Cloud App Service to take advantage of the same features of ICT in a more comprehensive experience for building Cloud Native applications in any programming language.
Version 1.2 of IBM Cloud Tools for Swift (ICT) was released on 8/29/2016! ICT for Swift provides Mac users with a simple interface for deploying, managing and monitoring end-to-end Swift applications. The application integrates with tools designed by IBM Swift Engineers to easily get started writing Swift on the Server.
In this release, we added the ability to view your server application’s logs within ICT. Log viewing includes logs you generate in your application and those created by the Bluemix hosting environment. By combining both of these sources, it will be easier to debug your application in the event of a crash or deployment failure and track the progress of your app’s deployments.
Viewing the Logs
To view an application’s logs, first click on the project that contains your application. You will see your app’s card with a button that says “Open Logs”. Click on that button to open the log window. If you have any recent logs in Bluemix, you will see them in the window. ICT will post subsequent logs at the bottom of the window.
You can have multiple logs for different cloud runtimes open at the same time, which can be very useful if your app consists of microservices with multiple cloud runtimes interacting on the server.
There are two main channels to which logs will output: OUT, comparable to stdout, and ERR, comparable to stderr. The segemented control on the top left of the log window can show one or both of these channels to help you easily see the information important to you at that time.
Selecting one of the segments will filter for only those logs in that channel. This especially makes it easier to track down specific errors.
At the top of the log window, you’ll see a dropdown with log types that represent the different sources for generating logs.
You can see the different types here. To filter by type, select the dropdown and pick the source you’d like to investigate. This can be useful if you only want to see logs you placed in your application. For more information about log types, click the information button next to the drop down.
In the center of the top control panel of the log window, there is a search bar for specific words or tags you want to find in the logs.
The application searches on all fields in the logs. Therefore, if you need to find a log with a specific time, channel, source, or phrasing, you can quickly find it.
You can also save the output in the log window to a text file to review later or share with your team. To export your logs, click on the gear icon in the upper right corner of the log window. Then select “Save Logs” or simply press CMD+S if the Log window is your active window.
After you select where you want to save the logs, it will be saved with the name
<your app name>_logs.txt in same format as the log window.
We hope this new logging functionality enhances your development process. If you have not already done so, download the IBM Cloud Tools for Swift Mac App If you would like to submit any feedback to our team, please complete our survey. To learn more about the Swift@IBM program, visit our website.