Red Hat Summit Red Hat Summitサポートコンソール開発者トライアルの開始お問い合わせ

このコンテンツは選択した言語では利用できません。

3.6.2. Programmatically Iterate Resources in a Deployment

The JBoss Modules library provides several APIs for iterating all deployment resources. The JavaDoc for the JBoss Modules API is located here: http://docs.jboss.org/jbossmodules/1.3.0.Final/api/. To use these APIs, you must add the following dependency to the MANIFEST.MF: 
Dependencies: org.jboss.modules
Copy to Clipboard Toggle word wrap
It is important to note that while these APIs provide increased flexibility, they will also run much more slowly than a direct path lookup.
This topic describes some of the ways you can programmatically iterate through resources in your application code.
List Resources Within a Deployment and Within All Imports
There are times when it is not possible to look up resources by the exact path. For example, the exact path may not be known or you may need to examine more than one file in a given path. In this case, the JBoss Modules library provides several APIs for iterating all deployment resources. You can iterate through resources in a deployment by utilizing one of two methods.
Iterate All Resources Found in a Single Module
The ModuleClassLoader.iterateResources() method iterates all the resources within this module class loader. This method takes two arguments: the starting directory name to search and a boolean that specifies whether it should recurse into subdirectories.
The following example demonstrates how to obtain the ModuleClassLoader and obtain the iterator for resources in the bin/ directory, recursing into subdirectories.

Example 3.12. Find resources in the "bin" directory, recursing into subdirectories.

ModuleClassLoader moduleClassLoader = (ModuleClassLoader) TargetClass.class.getClassLoader();
Iterator<Resource> mclResources = moduleClassLoader.iterateResources("bin",true);
Copy to Clipboard Toggle word wrap
The resultant iterator may be used to examine each matching resource and query its name and size (if available), open a readable stream, or acquire a URL for the resource.
Iterate All Resources Found in a Single Module and Imported Resources
The Module.iterateResources() method iterates all the resources within this module class loader, including the resources that are imported into the module. This method returns a much larger set than the previous method. This method requires an argument, which is a filter that narrows the result to a specific pattern. Alternatively, PathFilters.acceptAll() can be supplied to return the entire set.

Example 3.13. Find the entire set of resources in this module, including imports.

ModuleClassLoader moduleClassLoader = (ModuleClassLoader) TargetClass.class.getClassLoader();
Module module = moduleClassLoader.getModule();
Iterator<Resource> moduleResources = module.iterateResources(PathFilters.acceptAll());
Copy to Clipboard Toggle word wrap
Find All Resources That Match a Pattern
If you need to find only specific resources within your deployment or within your deployment's full import set, you need to filter the resource iteration. The JBoss Modules filtering APIs give you several tools to accomplish this.
Examine the Full Set of Dependencies
If you need to examine the full set of dependencies, you can use the Module.iterateResources() method's PathFilter parameter to check the name of each resource for a match.
Examine Deployment Dependencies
If you need to look only within the deployment, use the ModuleClassLoader.iterateResources() method. However, you must use additional methods to filter the resultant iterator. The PathFilters.filtered() method can provide a filtered view of a resource iterator this case. The PathFilters class includes many static methods to create and compose filters that perform various functions, including finding child paths or exact matches, or matching an Ant-style "glob" pattern.
Additional Code Examples For Filtering Resouces
The following examples demonstrate how to filter resources based on different criteria.

Example 3.14. Find all files named "messages.properties" in your deployment.

ModuleClassLoader moduleClassLoader = (ModuleClassLoader) TargetClass.class.getClassLoader();
Iterator<Resource> mclResources = PathFilters.filtered(PathFilters.match("**/messages.properties"), moduleClassLoader.iterateResources("", true));
Copy to Clipboard Toggle word wrap

Example 3.15. Find all files named "messages.properties" in your deployment and imports.

ModuleClassLoader moduleClassLoader = (ModuleClassLoader) TargetClass.class.getClassLoader();
Module module = moduleClassLoader.getModule();
Iterator<Resource> moduleResources = module.iterateResources(PathFilters.match("**/message.properties));
Copy to Clipboard Toggle word wrap

Example 3.16. Find all files inside any directory named "my-resources" in your deployment.

ModuleClassLoader moduleClassLoader = (ModuleClassLoader) TargetClass.class.getClassLoader();
Iterator<Resource> mclResources = PathFilters.filtered(PathFilters.match("**/my-resources/**"), moduleClassLoader.iterateResources("", true));
Copy to Clipboard Toggle word wrap

Example 3.17. Find all files named "messages" or "errors" in your deployment and imports.

ModuleClassLoader moduleClassLoader = (ModuleClassLoader) TargetClass.class.getClassLoader();
Module module = moduleClassLoader.getModule();
Iterator<Resource> moduleResources = module.iterateResources(PathFilters.any(PathFilters.match("**/messages"), PathFilters.match("**/errors"));
Copy to Clipboard Toggle word wrap

Example 3.18. Find all files in a specific package in your deployment.

ModuleClassLoader moduleClassLoader = (ModuleClassLoader) TargetClass.class.getClassLoader();
Iterator<Resource> mclResources = moduleClassLoader.iterateResources("path/form/of/packagename", false);
Copy to Clipboard Toggle word wrap
Report a bug
トップに戻る
Red Hat logoGithubredditYoutubeTwitter

詳細情報

試用、購入および販売

コミュニティー

Red Hat ドキュメントについて

Red Hat をお使いのお客様が、信頼できるコンテンツが含まれている製品やサービスを活用することで、イノベーションを行い、目標を達成できるようにします。 最新の更新を見る.

多様性を受け入れるオープンソースの強化

Red Hat では、コード、ドキュメント、Web プロパティーにおける配慮に欠ける用語の置き換えに取り組んでいます。このような変更は、段階的に実施される予定です。詳細情報: Red Hat ブログ.

会社概要

Red Hat は、企業がコアとなるデータセンターからネットワークエッジに至るまで、各種プラットフォームや環境全体で作業を簡素化できるように、強化されたソリューションを提供しています。

Theme

© 2025 Red Hat