GWT Inspector

A developer-focused tool to inspect GWT apps, analyze module structure, dependencies, and performance characteristics for debugging and optimization.

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About This Tool

GWT Inspector analyzes Google Web Toolkit applications by ingesting source trees and build artifacts to construct a static model of modules, permutations, and dependencies. It does not execute code, but builds a comprehensive graph and metrics from provided inputs. Conceptually, the tool resolves gwt.xml definitions, maps cross-module references, and estimates permutation load, enabling size estimation and optimization planning. Target users include platform architects, build engineers, and performance analysts who require reproducible insights prior to refactoring or migration. The tool’s unique value lies in its non-intrusive, artifact-driven analysis that exports data suitable for CI integration and architecture reviews. Core features include a module dependency graph, permutation analysis, lifecycle event timeline, size estimation, and guidance for code-splitting and lazy-loading boundaries. Typical use cases cover large multi-module GWT apps undergoing refactoring, modernization, or migration efforts. Outputs support engineering workflows with clear actionables and evidence for architectural decisions.

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How to Use

Provide inputs: point to GWT project root, gwt.xml files, and build artifacts such as nocache.js.\n
Run analysis: the tool parses modules, resolves dependencies, and computes permutations.\n
Review outputs: inspect the module graph, size estimates, and recommended optimization points.\n
Integrate results: export JSON reports to CI or architecture documentation.\n
Act on findings: adopt code-splitting strategies and dependency changes based on the analysis.

Frequently Asked Questions

Find Quick Answers

What data sources does GWT Inspector analyze?

It analyzes GWT module XML files, source trees, and build artifacts like nocache.js to construct a static model of modules, dependencies, and permutations. It does not run the application.

Can it handle multi-module projects?

Yes. It resolves inter-module dependencies, aggregates module graphs, and estimates combined load sizes across permutations, highlighting cross-module coupling and potential duplication to inform refactoring decisions.

What outputs are produced?

The tool exports a JSON graph, a human-readable report, and a prioritized action list with size estimates, recommended code-splitting points, and a lifecycle event timeline for analysis reviews.

Is this tool compatible with legacy GWT versions?

It supports common GWT versions and will note version-specific constraints; very old configurations may require customized module parsing and guidance for migration steps.

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