feat(retail): add Vertex AI Search for commerce snippets

[alarconesparza]

Description

Fixes internal b/502616950

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Checklist

• I have followed Sample Format Guide
• pom.xml parent set to latest shared-configuration
• Appropriate changes to README are included in PR
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• Tests pass: mvn clean verify required
• Lint passes: mvn -P lint checkstyle:check required
• Static Analysis: mvn -P lint clean compile pmd:cpd-check spotbugs:check advisory only
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• Please merge this PR for me once it is approved

[gemini-code-assist]

Code Review

This pull request introduces Java code samples for Vertex AI Search for commerce, covering basic search, pagination, and offset functionalities, along with corresponding integration tests. The review feedback identifies several improvement opportunities: using getTotalSize() instead of getResultsCount() to ensure accurate result counts across pages, simplifying API response handling, and removing redundant output in the samples. Additionally, the feedback suggests optimizing resource management in test utilities by reusing service clients instead of recreating them within loops.

[alarconesparza]

/gemini review

[gemini-code-assist]

Code Review

This pull request introduces Java code samples and integration tests for Vertex AI Search for commerce, covering basic search, pagination, and offset functionality. The feedback provided focuses on correcting an inaccurate description in the README, optimizing the POM file by leveraging the BOM for dependency management, and improving the efficiency and reliability of test utilities by reusing service clients and extending the indexing wait times to prevent flaky tests.

[alarconesparza]

/gemini review

[gemini-code-assist]

Code Review

This pull request introduces Java code samples for Vertex AI Search for commerce, including implementations for basic search, pagination, and offset-based results. It also provides a comprehensive suite of integration tests and a utility class for managing test data. A review comment suggests increasing the retry limit in the test utility to ensure products are fully indexed before tests run, reducing potential flakiness.

[XrossFox]

LGTM

[snippet-bot]

Here is the summary of changes.

You are about to add 3 region tags.

• retail/snippets/src/main/java/com/example/search/Search.java:19, tag retail_v2_search_request
• retail/snippets/src/main/java/com/example/search/SearchOffset.java:19, tag retail_v2_search_offset
• retail/snippets/src/main/java/com/example/search/SearchPagination.java:19, tag retail_v2_search_pagination

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[XrossFox]

LGTM

Just checked the new test, all is looking good to me.