Close underlying resources

w3stling commented 3 months ago

User description

This PR fixes some cases where the underlying resources are not closed properly.

If you use the iterator() or spliterator() methods, the underlying resources will not close automatically.

PR Type

Enhancement, Tests

Description

Introduced AutoCloseStream and related classes to manage stream resources automatically, ensuring proper closure and resource management.
Added StreamUtil class to facilitate stream operations, such as creating a stream from an iterator.
Implemented comprehensive tests in CloseTest to verify the automatic closure of streams and resource management.
Refactored existing tests to improve readability and maintainability, including updates to import paths and stream operations.

Changes walkthrough 📝

Relevant files

Enhancement

7 files

AbstractRssReader.java `Implement AutoCloseStream for automatic resource management` src/main/java/com/apptasticsoftware/rssreader/AbstractRssReader.java Introduced `AutoCloseStream` for automatic resource management. Replaced manual stream management with `AutoCloseStream`. Added `AtomicBoolean` for managing resource closure state.	+52/-48
StreamUtil.java `Add StreamUtil class for stream operations` src/main/java/com/apptasticsoftware/rssreader/internal/StreamUtil.java Added utility class `StreamUtil` for stream operations. Provided method to create a stream from an iterator.	+52/-0
AbstractAutoCloseStream.java `Introduce AbstractAutoCloseStream for lifecycle management` src/main/java/com/apptasticsoftware/rssreader/internal/stream/AbstractAutoCloseStream.java Introduced `AbstractAutoCloseStream` for managing stream lifecycle. Implemented automatic closure of streams.	+80/-0
AutoCloseDoubleStream.java `Implement AutoCloseDoubleStream for double stream management` src/main/java/com/apptasticsoftware/rssreader/internal/stream/AutoCloseDoubleStream.java Implemented `AutoCloseDoubleStream` for double stream management. Ensured automatic closure of double streams.	+227/-0
AutoCloseIntStream.java `Implement AutoCloseIntStream for integer stream management` src/main/java/com/apptasticsoftware/rssreader/internal/stream/AutoCloseIntStream.java Implemented `AutoCloseIntStream` for integer stream management. Ensured automatic closure of integer streams.	+234/-0
AutoCloseLongStream.java `Implement AutoCloseLongStream for long stream management` src/main/java/com/apptasticsoftware/rssreader/internal/stream/AutoCloseLongStream.java Implemented `AutoCloseLongStream` for long stream management. Ensured automatic closure of long streams.	+230/-0
AutoCloseStream.java `Implement AutoCloseStream for generic stream management` src/main/java/com/apptasticsoftware/rssreader/internal/stream/AutoCloseStream.java Implemented `AutoCloseStream` for generic stream management. Ensured automatic closure of generic streams.	+255/-0

Tests

3 files

CloseTest.java `Add tests for automatic stream closure` src/test/java/com/apptasticsoftware/integrationtest/CloseTest.java Added comprehensive tests for stream closure. Verified automatic resource management in streams.	+978/-0
SortTest.java `Refactor SortTest for improved readability` src/test/java/com/apptasticsoftware/integrationtest/SortTest.java Refactored test to use list of URLs. Simplified stream operations in tests.	+11/-13
rss-feed.xml `Add RSS feed XML for testing` src/test/resources/rss-feed.xml - Added RSS feed XML for testing purposes.	+330/-0

Miscellaneous

2 files

ConnectionTest.java `Update import path for RssServer` src/test/java/com/apptasticsoftware/integrationtest/ConnectionTest.java - Updated import path for `RssServer`.	+1/-1
RssServer.java `Move RssServer to internal package` src/test/java/com/apptasticsoftware/rssreader/internal/RssServer.java - Moved `RssServer` to internal package.	+1/-1

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github-actions[bot] commented 3 months ago

PR Reviewer Guide 🔍

⏱️ Estimated effort to review: 4 🔵🔵🔵🔵⚪

🧪 PR contains tests

🔒 No security concerns identified

⚡ Key issues to review

Possible Bug
The `AutoCloseStream.of` method is used to automatically close streams, but it's crucial to ensure that all underlying resources are properly closed, especially in error scenarios. The current implementation logs warnings but may not adequately handle resource leaks in all cases. Code Clarity
The `RssItemIterator` class uses an `AtomicBoolean` to manage state, which is good for thread safety. However, the logic inside the `close` method could be simplified or better documented to explain why certain checks and operations are necessary. Redundancy
The `StreamUtil` class provides a method to create a stream from an iterator, which is a straightforward utility. However, consider if this functionality is already provided by another library or Java itself, to avoid redundancy.

github-actions[bot] commented 3 months ago

PR Code Suggestions ✨

Category	Suggestion	Score
Possible bug	Add null-check filtering to prevent potential NullPointerExceptions ___ Consider handling the case where `null` values are added to `extendedUrlList` before processing it in the stream. This can prevent potential `NullPointerException` when methods like `Item::getPubDateZonedDateTime` are called on null items. [src/test/java/com/apptasticsoftware/integrationtest/SortTest.java [49-54]](https://github.com/w3stling/rssreader/pull/176/files#diff-a5a2f289e97cc69b4a29c88f13756332750ed25ccf17d16f24581f7bd1fccc51R49-R54) ```diff List extendedUrlList = new ArrayList<>(urlList); extendedUrlList.add(null); ... +.filter(Objects::nonNull) .map(Item::getPubDateZonedDateTime) ``` Suggestion importance[1-10]: 9 Why: This suggestion addresses a potential bug by adding a null-check filter, which can prevent NullPointerExceptions when processing the list. This is a significant improvement for code robustness.	9
Possible bug	Add exception handling to close the stream on errors ___ To prevent potential resource leaks, it's crucial to ensure that the `close()` method is called on the underlying stream if an exception occurs during the execution of terminal operations. Implement try-catch blocks around stream operations that might throw exceptions. [src/main/java/com/apptasticsoftware/rssreader/internal/stream/AutoCloseStream.java [131-135]](https://github.com/w3stling/rssreader/pull/176/files#diff-ea0e6007539bc1ffeaf372aed4e9150a2386233e42e043df169ba211d71fe579R131-R135) ```diff public void forEach(Consumer action) { autoClose(stream -> { - stream.forEach(action); + try { + stream.forEach(action); + } catch (Exception e) { + stream.close(); + throw e; + } return null; }); } ``` Suggestion importance[1-10]: 8 Why: This suggestion addresses a potential resource leak by ensuring the stream is closed if an exception occurs during terminal operations, which is crucial for robust resource management.	8
Enhancement	Use a comparator for sorting by publication date ___ Ensure that the `sorted()` method is called with a comparator when sorting items by their publication date. This is necessary because the default sorting may not work as expected without a proper comparator. [src/test/java/com/apptasticsoftware/integrationtest/SortTest.java [52-57]](https://github.com/w3stling/rssreader/pull/176/files#diff-a5a2f289e97cc69b4a29c88f13756332750ed25ccf17d16f24581f7bd1fccc51R52-R57) ```diff var timestamps = new RssReader().read(extendedUrlList) - .sorted() + .sorted(Comparator.comparing(item -> item.getPubDateZonedDateTime().orElse(null))) .map(Item::getPubDateZonedDateTime) .flatMap(Optional::stream) .map(t -> t.toInstant().toEpochMilli()) .collect(Collectors.toList()); ``` Suggestion importance[1-10]: 8 Why: The suggestion to use a comparator for sorting by publication date enhances the correctness of the sorting operation, ensuring that the items are sorted as intended. This is an important enhancement for functionality.	8
	Add checks for null and empty conditions before size assertion ___ Consider verifying the non-null and non-empty state of `timestamps` before asserting its size to enhance test robustness. [src/test/java/com/apptasticsoftware/integrationtest/SortTest.java [59]](https://github.com/w3stling/rssreader/pull/176/files#diff-a5a2f289e97cc69b4a29c88f13756332750ed25ccf17d16f24581f7bd1fccc51R59-R59) ```diff +assertNotNull(timestamps); +assertFalse(timestamps.isEmpty()); assertTrue(timestamps.size() > 200); ``` Suggestion importance[1-10]: 7 Why: Adding checks for null and empty conditions before asserting the size enhances test robustness and reliability, ensuring that the test does not fail unexpectedly due to null or empty lists.	7
	Enhance `onClose()` to support chaining of close handlers ___ The `onClose()` method should ensure that multiple close handlers can be registered and invoked in a chain. This is crucial for proper resource management, especially when streams are composed of multiple operations that each may require clean-up. [src/main/java/com/apptasticsoftware/rssreader/internal/stream/AutoCloseStream.java [252-253]](https://github.com/w3stling/rssreader/pull/176/files#diff-ea0e6007539bc1ffeaf372aed4e9150a2386233e42e043df169ba211d71fe579R252-R253) ```diff public Stream onClose(Runnable closeHandler) { - return asAutoCloseStream(stream().onClose(closeHandler)); + return asAutoCloseStream(stream().onClose(() -> { + try { + closeHandler.run(); + } finally { + super.onClose(closeHandler); + } + })); } ``` Suggestion importance[1-10]: 6 Why: The suggestion to support chaining of close handlers in `onClose()` improves resource management by allowing multiple handlers, although the current implementation may already suffice for many use cases.	6
	Use Optional for null checks and conditional logging ___ Replace the manual null check with `Optional` to streamline the null handling and improve readability. [src/main/java/com/apptasticsoftware/rssreader/AbstractRssReader.java [449-451]](https://github.com/w3stling/rssreader/pull/176/files#diff-5a097d88f39fdbd552c3310d7b5e1c547981bb185595f89a39dfa2d43982502cR449-R451) ```diff -if (LOGGER.isLoggable(Level.WARNING)) { - LOGGER.log(Level.WARNING, () -> String.format("Failed read URL %s. Message: %s", url, e.getMessage())); -} +Optional.ofNullable(LOGGER) + .filter(logger -> logger.isLoggable(Level.WARNING)) + .ifPresent(logger -> logger.log(Level.WARNING, () -> String.format("Failed read URL %s. Message: %s", url, e.getMessage()))); ``` Suggestion importance[1-10]: 5 Why: Using Optional for null checks can improve readability, but the existing code does not perform a null check on LOGGER, making the suggestion partially relevant.	5
	Override `parallel()` and `sequential()` to maintain stream state ___ Consider overriding the `BaseStream.parallel()` and `BaseStream.sequential()` methods to ensure that the state of the stream (parallel or sequential) is preserved when wrapping the stream. This will maintain consistency in the behavior of the stream when these methods are used. [src/main/java/com/apptasticsoftware/rssreader/internal/stream/AutoCloseStream.java [242-243]](https://github.com/w3stling/rssreader/pull/176/files#diff-ea0e6007539bc1ffeaf372aed4e9150a2386233e42e043df169ba211d71fe579R242-R243) ```diff +@Override public Stream parallel() { + super.parallel(); return asAutoCloseStream(stream().parallel()); } +@Override public Stream sequential() { + super.sequential(); return asAutoCloseStream(stream().sequential()); ``` Suggestion importance[1-10]: 3 Why: The suggestion to override `parallel()` and `sequential()` methods with calls to `super` is unnecessary because the current implementation already correctly wraps the stream while maintaining its state. The suggestion does not provide a significant improvement.	3
Best practice	Use specific catch blocks for different exceptions in the close method ___ Use a more specific exception handler for the `XMLStreamException` and `IOException` in the `close` method to provide more targeted error handling. [src/main/java/com/apptasticsoftware/rssreader/AbstractRssReader.java [607-611]](https://github.com/w3stling/rssreader/pull/176/files#diff-5a097d88f39fdbd552c3310d7b5e1c547981bb185595f89a39dfa2d43982502cR607-R611) ```diff -} catch (XMLStreamException \| IOException e) { - if (LOGGER.isLoggable(Level.WARNING)) { - LOGGER.log(Level.WARNING, "Failed to close XML stream. ", e); - } +} catch (XMLStreamException e) { + LOGGER.log(Level.SEVERE, "Error closing XML stream", e); +} catch (IOException e) { + LOGGER.log(Level.SEVERE, "IO error when closing stream", e); } ``` Suggestion importance[1-10]: 8 Why: Using specific catch blocks for different exceptions allows for more targeted error handling and logging, improving code clarity and maintainability.	8
Resource management	Ensure proper resource management in AutoCloseStream ___ Ensure that the `AutoCloseStream` properly handles potential exceptions during the stream operations to prevent resource leaks. [src/main/java/com/apptasticsoftware/rssreader/AbstractRssReader.java [443-465]](https://github.com/w3stling/rssreader/pull/176/files#diff-5a097d88f39fdbd552c3310d7b5e1c547981bb185595f89a39dfa2d43982502cR443-R465) ```diff return AutoCloseStream.of(urls.stream() ... return Stream.empty(); -})); +}).onClose(() -> { + // Ensure all resources are closed properly here +}); ``` Suggestion importance[1-10]: 7 Why: Adding an onClose handler to ensure resources are closed properly is a good practice for resource management, enhancing the robustness of the code.	7
Possible issue	Modify `iterator()` and `spliterator()` to prevent resource leaks ___ The `iterator()` and `spliterator()` methods currently return the underlying stream's iterators without ensuring they are auto-closed. This could lead to resource leaks if not handled properly. Consider implementing these methods to support auto-closing features or throw an `UnsupportedOperationException` if they should not be used. [src/main/java/com/apptasticsoftware/rssreader/internal/stream/AutoCloseStream.java [222-228]](https://github.com/w3stling/rssreader/pull/176/files#diff-ea0e6007539bc1ffeaf372aed4e9150a2386233e42e043df169ba211d71fe579R222-R228) ```diff public Iterator iterator() { - return stream().iterator(); + throw new UnsupportedOperationException("Auto-closing iterator is not supported."); } public Spliterator spliterator() { - return stream().spliterator(); + throw new UnsupportedOperationException("Auto-closing spliterator is not supported."); } ``` Suggestion importance[1-10]: 7 Why: The suggestion to throw `UnsupportedOperationException` for `iterator()` and `spliterator()` is valid as it prevents potential resource leaks by discouraging their use, aligning with the class's design to auto-close streams.	7
Maintainability	Use explicit type definitions instead of 'var' for clarity ___ Replace the use of `var` with explicit type definitions for better code readability and maintainability, especially in a testing environment where clarity is crucial. [src/test/java/com/apptasticsoftware/integrationtest/SortTest.java [52-57]](https://github.com/w3stling/rssreader/pull/176/files#diff-a5a2f289e97cc69b4a29c88f13756332750ed25ccf17d16f24581f7bd1fccc51R52-R57) ```diff -var timestamps = new RssReader().read(extendedUrlList) +List timestamps = new RssReader().read(extendedUrlList) ... .collect(Collectors.toList()); ``` Suggestion importance[1-10]: 6 Why: Replacing 'var' with explicit type definitions improves code readability and maintainability, which is beneficial in a testing environment. However, it is a minor improvement compared to functional changes.	6

github-actions[bot] commented 3 months ago

Test Results

10 files 10 suites 33s :stopwatch: 273 tests 271 :white_check_mark: 2 :zzz: 0 :x: 281 runs 279 :white_check_mark: 2 :zzz: 0 :x:

Results for commit 297a4ade.

:recycle: This comment has been updated with latest results.

sonarcloud[bot] commented 3 months ago

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
98.6% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

Category	Suggestion	Score
Possible bug	Add null-check filtering to prevent potential NullPointerExceptions ___ Consider handling the case where `null` values are added to `extendedUrlList` before processing it in the stream. This can prevent potential `NullPointerException` when methods like `Item::getPubDateZonedDateTime` are called on null items. [src/test/java/com/apptasticsoftware/integrationtest/SortTest.java [49-54]](https://github.com/w3stling/rssreader/pull/176/files#diff-a5a2f289e97cc69b4a29c88f13756332750ed25ccf17d16f24581f7bd1fccc51R49-R54) ```diff List extendedUrlList = new ArrayList<>(urlList); extendedUrlList.add(null); ... +.filter(Objects::nonNull) .map(Item::getPubDateZonedDateTime) ``` Suggestion importance[1-10]: 9 Why: This suggestion addresses a potential bug by adding a null-check filter, which can prevent NullPointerExceptions when processing the list. This is a significant improvement for code robustness.	9
Possible bug	Add exception handling to close the stream on errors ___ To prevent potential resource leaks, it's crucial to ensure that the `close()` method is called on the underlying stream if an exception occurs during the execution of terminal operations. Implement try-catch blocks around stream operations that might throw exceptions. [src/main/java/com/apptasticsoftware/rssreader/internal/stream/AutoCloseStream.java [131-135]](https://github.com/w3stling/rssreader/pull/176/files#diff-ea0e6007539bc1ffeaf372aed4e9150a2386233e42e043df169ba211d71fe579R131-R135) ```diff public void forEach(Consumer action) { autoClose(stream -> { - stream.forEach(action); + try { + stream.forEach(action); + } catch (Exception e) { + stream.close(); + throw e; + } return null; }); } ``` Suggestion importance[1-10]: 8 Why: This suggestion addresses a potential resource leak by ensuring the stream is closed if an exception occurs during terminal operations, which is crucial for robust resource management.	8
Enhancement	Use a comparator for sorting by publication date ___ Ensure that the `sorted()` method is called with a comparator when sorting items by their publication date. This is necessary because the default sorting may not work as expected without a proper comparator. [src/test/java/com/apptasticsoftware/integrationtest/SortTest.java [52-57]](https://github.com/w3stling/rssreader/pull/176/files#diff-a5a2f289e97cc69b4a29c88f13756332750ed25ccf17d16f24581f7bd1fccc51R52-R57) ```diff var timestamps = new RssReader().read(extendedUrlList) - .sorted() + .sorted(Comparator.comparing(item -> item.getPubDateZonedDateTime().orElse(null))) .map(Item::getPubDateZonedDateTime) .flatMap(Optional::stream) .map(t -> t.toInstant().toEpochMilli()) .collect(Collectors.toList()); ``` Suggestion importance[1-10]: 8 Why: The suggestion to use a comparator for sorting by publication date enhances the correctness of the sorting operation, ensuring that the items are sorted as intended. This is an important enhancement for functionality.	8
	Add checks for null and empty conditions before size assertion ___ Consider verifying the non-null and non-empty state of `timestamps` before asserting its size to enhance test robustness. [src/test/java/com/apptasticsoftware/integrationtest/SortTest.java [59]](https://github.com/w3stling/rssreader/pull/176/files#diff-a5a2f289e97cc69b4a29c88f13756332750ed25ccf17d16f24581f7bd1fccc51R59-R59) ```diff +assertNotNull(timestamps); +assertFalse(timestamps.isEmpty()); assertTrue(timestamps.size() > 200); ``` Suggestion importance[1-10]: 7 Why: Adding checks for null and empty conditions before asserting the size enhances test robustness and reliability, ensuring that the test does not fail unexpectedly due to null or empty lists.	7
	Enhance `onClose()` to support chaining of close handlers ___ The `onClose()` method should ensure that multiple close handlers can be registered and invoked in a chain. This is crucial for proper resource management, especially when streams are composed of multiple operations that each may require clean-up. [src/main/java/com/apptasticsoftware/rssreader/internal/stream/AutoCloseStream.java [252-253]](https://github.com/w3stling/rssreader/pull/176/files#diff-ea0e6007539bc1ffeaf372aed4e9150a2386233e42e043df169ba211d71fe579R252-R253) ```diff public Stream onClose(Runnable closeHandler) { - return asAutoCloseStream(stream().onClose(closeHandler)); + return asAutoCloseStream(stream().onClose(() -> { + try { + closeHandler.run(); + } finally { + super.onClose(closeHandler); + } + })); } ``` Suggestion importance[1-10]: 6 Why: The suggestion to support chaining of close handlers in `onClose()` improves resource management by allowing multiple handlers, although the current implementation may already suffice for many use cases.	6
	Use Optional for null checks and conditional logging ___ Replace the manual null check with `Optional` to streamline the null handling and improve readability. [src/main/java/com/apptasticsoftware/rssreader/AbstractRssReader.java [449-451]](https://github.com/w3stling/rssreader/pull/176/files#diff-5a097d88f39fdbd552c3310d7b5e1c547981bb185595f89a39dfa2d43982502cR449-R451) ```diff -if (LOGGER.isLoggable(Level.WARNING)) { - LOGGER.log(Level.WARNING, () -> String.format("Failed read URL %s. Message: %s", url, e.getMessage())); -} +Optional.ofNullable(LOGGER) + .filter(logger -> logger.isLoggable(Level.WARNING)) + .ifPresent(logger -> logger.log(Level.WARNING, () -> String.format("Failed read URL %s. Message: %s", url, e.getMessage()))); ``` Suggestion importance[1-10]: 5 Why: Using Optional for null checks can improve readability, but the existing code does not perform a null check on LOGGER, making the suggestion partially relevant.	5
	Override `parallel()` and `sequential()` to maintain stream state ___ Consider overriding the `BaseStream.parallel()` and `BaseStream.sequential()` methods to ensure that the state of the stream (parallel or sequential) is preserved when wrapping the stream. This will maintain consistency in the behavior of the stream when these methods are used. [src/main/java/com/apptasticsoftware/rssreader/internal/stream/AutoCloseStream.java [242-243]](https://github.com/w3stling/rssreader/pull/176/files#diff-ea0e6007539bc1ffeaf372aed4e9150a2386233e42e043df169ba211d71fe579R242-R243) ```diff +@Override public Stream parallel() { + super.parallel(); return asAutoCloseStream(stream().parallel()); } +@Override public Stream sequential() { + super.sequential(); return asAutoCloseStream(stream().sequential()); ``` Suggestion importance[1-10]: 3 Why: The suggestion to override `parallel()` and `sequential()` methods with calls to `super` is unnecessary because the current implementation already correctly wraps the stream while maintaining its state. The suggestion does not provide a significant improvement.	3
Best practice	Use specific catch blocks for different exceptions in the close method ___ Use a more specific exception handler for the `XMLStreamException` and `IOException` in the `close` method to provide more targeted error handling. [src/main/java/com/apptasticsoftware/rssreader/AbstractRssReader.java [607-611]](https://github.com/w3stling/rssreader/pull/176/files#diff-5a097d88f39fdbd552c3310d7b5e1c547981bb185595f89a39dfa2d43982502cR607-R611) ```diff -} catch (XMLStreamException \| IOException e) { - if (LOGGER.isLoggable(Level.WARNING)) { - LOGGER.log(Level.WARNING, "Failed to close XML stream. ", e); - } +} catch (XMLStreamException e) { + LOGGER.log(Level.SEVERE, "Error closing XML stream", e); +} catch (IOException e) { + LOGGER.log(Level.SEVERE, "IO error when closing stream", e); } ``` Suggestion importance[1-10]: 8 Why: Using specific catch blocks for different exceptions allows for more targeted error handling and logging, improving code clarity and maintainability.	8
Resource management	Ensure proper resource management in AutoCloseStream ___ Ensure that the `AutoCloseStream` properly handles potential exceptions during the stream operations to prevent resource leaks. [src/main/java/com/apptasticsoftware/rssreader/AbstractRssReader.java [443-465]](https://github.com/w3stling/rssreader/pull/176/files#diff-5a097d88f39fdbd552c3310d7b5e1c547981bb185595f89a39dfa2d43982502cR443-R465) ```diff return AutoCloseStream.of(urls.stream() ... return Stream.empty(); -})); +}).onClose(() -> { + // Ensure all resources are closed properly here +}); ``` Suggestion importance[1-10]: 7 Why: Adding an onClose handler to ensure resources are closed properly is a good practice for resource management, enhancing the robustness of the code.	7
Possible issue	Modify `iterator()` and `spliterator()` to prevent resource leaks ___ The `iterator()` and `spliterator()` methods currently return the underlying stream's iterators without ensuring they are auto-closed. This could lead to resource leaks if not handled properly. Consider implementing these methods to support auto-closing features or throw an `UnsupportedOperationException` if they should not be used. [src/main/java/com/apptasticsoftware/rssreader/internal/stream/AutoCloseStream.java [222-228]](https://github.com/w3stling/rssreader/pull/176/files#diff-ea0e6007539bc1ffeaf372aed4e9150a2386233e42e043df169ba211d71fe579R222-R228) ```diff public Iterator iterator() { - return stream().iterator(); + throw new UnsupportedOperationException("Auto-closing iterator is not supported."); } public Spliterator spliterator() { - return stream().spliterator(); + throw new UnsupportedOperationException("Auto-closing spliterator is not supported."); } ``` Suggestion importance[1-10]: 7 Why: The suggestion to throw `UnsupportedOperationException` for `iterator()` and `spliterator()` is valid as it prevents potential resource leaks by discouraging their use, aligning with the class's design to auto-close streams.	7
Maintainability	Use explicit type definitions instead of 'var' for clarity ___ Replace the use of `var` with explicit type definitions for better code readability and maintainability, especially in a testing environment where clarity is crucial. [src/test/java/com/apptasticsoftware/integrationtest/SortTest.java [52-57]](https://github.com/w3stling/rssreader/pull/176/files#diff-a5a2f289e97cc69b4a29c88f13756332750ed25ccf17d16f24581f7bd1fccc51R52-R57) ```diff -var timestamps = new RssReader().read(extendedUrlList) +List timestamps = new RssReader().read(extendedUrlList) ... .collect(Collectors.toList()); ``` Suggestion importance[1-10]: 6 Why: Replacing 'var' with explicit type definitions improves code readability and maintainability, which is beneficial in a testing environment. However, it is a minor improvement compared to functional changes.	6

w3stling / rssreader