SyntaxStandard
arthas-watch Verified for current stable LTS

Arthas Watch Command: Conditional Parameter Observation

An engineer would use the arthas-watch command in a production environment to monitor and log the return values of a specific method in a class, only when the first parameter equals '5', allowing for targeted debugging and performance analysis. Exact CLI syntax to conditional parameter observation using Arthas Watch.

When to use this: An engineer would use the arthas-watch command in a production environment to monitor and log the return values of a specific method in a class, only when the first parameter equals '5', allowing for targeted debugging and performance analysis.

Command Syntax

watch <class-pattern> <method-pattern> '{< params[1],returnObj >}' '<"5".equals(params[0])>' -x 4

Command Breakdown

-x
Command Option
Tool-specific option used by this command invocation.

FAQ

Purpose: Exact syntax to conditional parameter observation using Arthas Watch.

Test path: Replace placeholders and run destructive commands in a disposable workspace first.

Flag behavior: Tool version, platform, and shell can change behavior.

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Related Operations

Arthas Watch Command: Observe Parameters And Return Value When First Is Five watch <class-pattern> <method-pattern> '{< params[1],returnObj >}' '<"5".equals(params[0])>' -x 4 Arthas Watch Command: Observe First Parameter And Return Value watch <class-pattern> <method-pattern> '{< params[0],returnObj >}' -x 4 Arthas Watch Command: Observe Count Property On Return Or Exception watch <class-pattern> <method-pattern> '{< params[1].count >}' -e -s Arthas Watch Command: Observe First Parameter Return Value watch <class-pattern> <method-pattern> '{< params[0],returnObj >}' -x 4 Arthas Watch Command: Observe Second Parameter Count watch <class-pattern> <method-pattern> '{< params[1].count >}' -e -s
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