When you hit a breakpoint on a stream, press the stream debugger icon in the debugger. You can use it to inspect the results of the stream operation visually. IntelliJ has a brand new cool tool, the stream debugger. Instead, you need a tool that can help you analyze what’s going on inside the stream. Streams condense multiple functions into a single statement, so simply stepping over the statements with a debugger is impractical. Java 8 streams are very cool to use but notoriously hard to debug. The IDE supports activating this feature dynamically when the IDE detects a stack trace in the clipboard. To access the feature go to the Analyze menu. This capability is very useful when traversing stack dumps from server logs, because you can instantly jump to the relevant files like you can with a local stack trace. “Analyze Thread Dump” automatically detects a stack trace in the clipboard and instantly places it with links to your source code. We recommend using IntelliJ’s “Analyze Thread Dump” feature because of its convenient browsing capabilities that make the dump easy to analyze. Analyzing thread dumps will enable you to identify deadlocks or contention issues. Thread dumps are used to diagnose system and performance issues. Upon restart you should see the new option under the Tools menu.Ī thread dump is a snapshot that shows what each thread is doing at a specific time. Then type in idea.is.internal=trueĪnd save. To enable Internal Actions se lect Help -> Edit Custom Properties. It’s always handy to have a wide set of tools at your disposal, providing you with options you may have never thought of yourself. This feature includes a lot of convenient options, like a component inspector and a UI debugger. If you’re writing a custom IntelliJ/IDEA plugin, enable Internal Actions ( Tools -> Internal Actions) for easy debugging. Enable the “Internal Actions” Menu for Custom Plugin Development Lightrun offers conditions for all its actions: snapshots, logs etc. Notice that a condition can be very elaborate and even invoke methods as part of the condition. So instead of throwing a null pointer exception we’ll be able to inspect the current state of the VM (virtual machine) before it does. In the loop below, you can see the breakpoint will stop the service when the agent id value is null. For example, in a loop you can define a breakpoint that will only stop on the actual bug, relieving you from manually going over loops until you run into an issue! Use conditions to narrow down issues far more easily, to save time and the work of hunting for issues. This is one of the most under-utilised tools in debuggers and possibly one of the most effective ones. Lightrun offers snapshots – breakpoints that do not stop the program from running. This will help you focus the analysis of your code behavior. All you have to do is define the package that has your project’s files. So you can define a breakpoint that will stop on a line that throws NullPointerException and ignore the exceptions that are thrown from files that belong to other libraries. We especially recommend the IntelliJ Exception breakpoint because you can also filter the class or package the exceptions are a part of. This breakpoint type suspends the program according to an exception type, and not at a pre-defined place. We recommend using the exception breakpoint. IntelliJ offers a wide variety of breakpoints, including line breakpoints, method breakpoints and exception breakpoints. They allow inspecting the code behavior and its functions to try to identify the error. Use an Exception Breakpointīreakpoints are places in the code that stop the program, to enable debugging. We hope these tips will help you find and resolve bugs faster. To help, we’ve compiled a list of tips and tricks from our very own developers here at Lightrun. If we’re feeling frisky, we might use a conditional breakpoint.īut guess what, the IntelliJ IDEA debugger has many powerful and cutting-edge features that are useful for debugging more easily and efficiently. Usually, we only use the breakpoint option. We use debugging tools on a daily basis – they’re an essential part of programming. As developers, we’re all familiar with debuggers.
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