Increased performance issue while generating BenId's #48
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* Build failed resolved * jwttoken and user-agent validation * null check * Code optimize and performance * Performance increase * Build errors * Test cases ignored * Ignored test cases * Security hotspot fix * security hotspot issue * performance check
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Important Review skippedAuto reviews are disabled on base/target branches other than the default branch. Please check the settings in the CodeRabbit UI or the You can disable this status message by setting the WalkthroughThe changes refactor beneficiary ID generation and insertion in Changes
Sequence Diagram(s)sequenceDiagram
participant Client
participant GenerateBeneficiaryService
participant Generator
participant JdbcTemplate
Client->>GenerateBeneficiaryService: createFile()
GenerateBeneficiaryService->>Generator: createBatchData(num)
Generator-->>GenerateBeneficiaryService: List<Object[]> (IDs)
loop For each batch of 500
GenerateBeneficiaryService->>JdbcTemplate: batchUpdate(SQL, batch)
JdbcTemplate-->>GenerateBeneficiaryService: update result
end
GenerateBeneficiaryService-->>Client: (done)
Estimated code review effort🎯 4 (Complex) | ⏱️ ~35 minutes Possibly related PRs
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✨ Finishing Touches🧪 Generate unit tests
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Actionable comments posted: 5
🔭 Outside diff range comments (2)
src/main/java/com/iemr/common/bengen/service/GenerateBeneficiaryService.java (2)
137-184: Refactor to use batch insert approach and fix SQL injection risk.This method still uses the old StringBuilder approach and has SQL injection vulnerability. It should be refactored to match the new batch insert pattern used in
createFile().public List<M_BeneficiaryRegidMapping> getBeneficiaryIDs(Long num, Integer vanID) { logger.info("getBeneficiaryIDs start"); long strt = System.currentTimeMillis(); - Generator g = new Generator(); - StringBuffer sb = new StringBuffer( - "INSERT INTO `db_identity`.`m_beneficiaryregidmapping` " + - "(`BeneficiaryID`,`Provisioned`,`Deleted`,`Reserved`," + - "`CreatedDate`,`CreatedBy`,`VanID`) VALUES "); + Timestamp ts = Timestamp.from(Instant.now()); List<M_BeneficiaryRegidMapping> list = new ArrayList<M_BeneficiaryRegidMapping>(); - for (int i = 0; i < num; i++) { - sb.append("( "); - sb.append(g.generateBeneficiaryId()).append(",").append("b'0'") - .append(",").append("b'0'").append(",") - .append("b'1'").append(",").append("'") - .append(ts).append("',").append("'admin-batch'").append(",") - .append(vanID).append(""); - sb.append(" ), "); - } - - sb.deleteCharAt(sb.lastIndexOf(",")); - - jdbcTemplate.execute(sb.toString()); + // Generate batch data + List<Object[]> batchData = IntStream.range(0, num.intValue()) + .mapToObj(i -> { + Generator g = new Generator(); + return new Object[]{ + g.generateBeneficiaryId(), + false, // Provisioned + false, // Deleted + true, // Reserved + ts, + "admin-batch", + vanID + }; + }) + .collect(Collectors.toList()); + + // Batch insert using parameterized query (prevents SQL injection) + String sql = "INSERT INTO `db_identity`.`m_beneficiaryregidmapping` " + + "(`BeneficiaryID`,`Provisioned`,`Deleted`,`Reserved`,`CreatedDate`,`CreatedBy`,`VanID`) " + + "VALUES (?, b'0', b'0', b'1', ?, ?, ?)"; + + for (int i = 0; i < batchData.size(); i += BATCH_SIZE) { + List<Object[]> batch = batchData.subList(i, Math.min(i + BATCH_SIZE, batchData.size())); + jdbcTemplate.batchUpdate(sql, batch); + } List<Object[]> result = null; logger.info("ts result1 = " + ts); result = beneficiaryIdRepo.getBenIDGenerated(vanID, num);
115-135: Remove test/debug methods from production code.The methods
testLoopGenr()andtestPMDAvoidGenr()appear to be test or debug code that should not be in production.These methods should be removed or moved to test classes.
🧹 Nitpick comments (3)
src/main/java/com/iemr/common/bengen/utils/JwtUserIdValidationFilter.java (2)
71-73: Remove or complete the orphan log statement
logger.info("JWT token from header: ");prints an empty message and provides no debugging value after the variable was removed.
Either drop the line or log something meaningful (e.g., header presence) to avoid noise.
149-155:isMobileClientnull-check looks good – consider tightening the flowThe added braces fix the previous scoping bug – nice catch.
As a micro-refactor, you could invert the condition and early-return to reduce nesting:- if (userAgent == null) { - return false; - } - userAgent = userAgent.toLowerCase(); - return userAgent.contains("okhttp"); + if (userAgent == null) return false; + return userAgent.toLowerCase().contains("okhttp");Purely optional – current logic is correct.
src/test/java/com/iemr/common/bengen/service/GenerateBeneficiaryServiceTest.java (1)
349-362: Consider making timeout configurable.The 5-second timeout is hardcoded. Consider making it configurable or environment-specific to avoid flaky tests on slower CI environments.
+private static final Duration TEST_TIMEOUT = Duration.ofSeconds( + Integer.parseInt(System.getProperty("test.timeout.seconds", "5")) +); @Test @DisplayName("Should complete file creation within reasonable time") void createFile_performance_shouldCompleteWithinTimeout() throws IOException { // ... setup code ... // Act & Assert - assertTimeoutPreemptively(Duration.ofSeconds(5), () -> { + assertTimeoutPreemptively(TEST_TIMEOUT, () -> { generateBeneficiaryService.createFile(); }); }
📜 Review details
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📒 Files selected for processing (4)
src/main/java/com/iemr/common/bengen/service/GenerateBeneficiaryService.java(3 hunks)src/main/java/com/iemr/common/bengen/utils/Generator.java(2 hunks)src/main/java/com/iemr/common/bengen/utils/JwtUserIdValidationFilter.java(1 hunks)src/test/java/com/iemr/common/bengen/service/GenerateBeneficiaryServiceTest.java(2 hunks)
🧰 Additional context used
🧠 Learnings (1)
📚 Learning: the jwt implementation in beneficiaryid-generation-api should be kept simple with only essential cla...
Learnt from: indraniBan
PR: PSMRI/BeneficiaryID-Generation-API#20
File: src/main/java/com/iemr/common/bengen/utils/JwtUtil.java:32-40
Timestamp: 2025-02-10T10:40:00.839Z
Learning: The JWT implementation in BeneficiaryID-Generation-API should be kept simple with only essential claims (subject, userId, issuedAt, expiration). Additional standard claims (jti, iss, aud) are not required.
Applied to files:
src/main/java/com/iemr/common/bengen/utils/JwtUserIdValidationFilter.java
🧬 Code Graph Analysis (1)
src/main/java/com/iemr/common/bengen/utils/Generator.java (1)
src/main/java/com/iemr/common/bengen/utils/Verhoeff.java (1)
Verhoeff(30-127)
🔇 Additional comments (7)
src/main/java/com/iemr/common/bengen/utils/Generator.java (4)
42-64: LGTM! Well-structured beneficiary ID generation.The method correctly generates a beneficiary ID with proper checksum calculation and efficient use of constants. The debug logging is appropriately guarded.
66-69: Good implementation with appropriate range constraints.The method correctly generates the first part of the beneficiary ID with a non-zero, non-one leading digit.
117-122: Good optimization with debug guard.The method efficiently skips execution when debug logging is disabled.
124-130: Efficient helper method implementation.Good use of StringBuilder with capacity hint for performance.
src/main/java/com/iemr/common/bengen/service/GenerateBeneficiaryService.java (1)
94-113: No thread-safety issues with Generator—parallel use is safe.The
Generatorclass holds onlystatic finalconstants and a logger; all random digits are produced by locally instantiatedSecureRandomin each call. There’s no mutable shared state, so callingg.generateBeneficiaryId()in parallel won’t introduce race conditions.• Generator fields (Logger, TEN, TEN_POW_10) are immutable/static.
• EachgetRandomDigit()creates its ownSecureRandom.You can keep the single
Generator g = new Generator()outside the stream. If you want to optimize performance, consider using a thread-local or sharedSecureRandomper thread, but it isn’t required for correctness in this batch scenario.src/test/java/com/iemr/common/bengen/service/GenerateBeneficiaryServiceTest.java (2)
89-136: Well-structured test coverage for batch data generation.The tests properly verify the new batch data creation approach with good coverage of edge cases including zero records.
278-344: Comprehensive batch insert testing.Good coverage of the batch insert functionality including various record counts and error scenarios.
| private ExecutorService executor = Executors.newCachedThreadPool(); | ||
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| private static final int BATCH_SIZE = 500; |
There was a problem hiding this comment.
ExecutorService is never shutdown - potential resource leak.
The ExecutorService at line 51 is created but never shutdown, which can lead to thread leaks.
Add proper lifecycle management:
+import javax.annotation.PreDestroy;
@Service
public class GenerateBeneficiaryService {
private static final Logger logger = LoggerFactory.getLogger(GenerateBeneficiaryService.class);
private ExecutorService executor = Executors.newCachedThreadPool();
+ @PreDestroy
+ public void cleanup() {
+ logger.info("Shutting down executor service");
+ executor.shutdown();
+ try {
+ if (!executor.awaitTermination(60, TimeUnit.SECONDS)) {
+ executor.shutdownNow();
+ }
+ } catch (InterruptedException e) {
+ executor.shutdownNow();
+ Thread.currentThread().interrupt();
+ }
+ }📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| private ExecutorService executor = Executors.newCachedThreadPool(); | |
| private static final int BATCH_SIZE = 500; | |
| // … other imports … | |
| import javax.annotation.PreDestroy; | |
| @Service | |
| public class GenerateBeneficiaryService { | |
| private static final Logger logger = LoggerFactory.getLogger(GenerateBeneficiaryService.class); | |
| private ExecutorService executor = Executors.newCachedThreadPool(); | |
| private static final int BATCH_SIZE = 500; | |
| @PreDestroy | |
| public void cleanup() { | |
| logger.info("Shutting down executor service"); | |
| executor.shutdown(); | |
| try { | |
| if (!executor.awaitTermination(60, TimeUnit.SECONDS)) { | |
| executor.shutdownNow(); | |
| } | |
| } catch (InterruptedException e) { | |
| executor.shutdownNow(); | |
| Thread.currentThread().interrupt(); | |
| } | |
| } | |
| // … existing methods … | |
| } |
🤖 Prompt for AI Agents
In src/main/java/com/iemr/common/bengen/service/GenerateBeneficiaryService.java
around lines 51 to 52, the ExecutorService is instantiated but never shut down,
causing potential thread leaks. Add a method to properly shut down the executor,
such as a shutdown or close method, and ensure it is called when the service is
no longer needed. Use executor.shutdown() followed by awaitTermination to
gracefully stop the threads.
| public void createFile() { | ||
| logger.info("BengenApplication.createFile start"); | ||
| long strt = System.currentTimeMillis(); | ||
|
|
||
| try { | ||
| File file = File.createTempFile("" + System.currentTimeMillis(), ".csv"); | ||
| logger.info("File: " + file.getAbsolutePath()); | ||
| FileWriter fw = new FileWriter(file); | ||
| BufferedWriter bw = new BufferedWriter(fw); | ||
| Integer bentobeGenerate = ConfigProperties.getInteger("no-of-benID-to-be-generate"); | ||
| bw.write(createQuery(bentobeGenerate).toString()); | ||
| bw.flush(); | ||
| bw.close(); | ||
| } catch (IOException ioe) { | ||
| ioe.printStackTrace(); | ||
| } | ||
| long fin = System.currentTimeMillis() - strt; | ||
| logger.info("BengenApplication.createFile finish. time = " + fin + " ms."); | ||
| } | ||
|
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||
| public StringBuffer createQuery(Integer num) { | ||
| logger.info("BengenApplication.createQuery start"); | ||
| long strt = System.currentTimeMillis(); | ||
|
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| Generator g = new Generator(); | ||
| StringBuffer sb = new StringBuffer( | ||
| "INSERT INTO `db_identity`.`m_beneficiaryregidmapping` " + | ||
| "(`BeneficiaryID`,`Provisioned`,`Deleted`," + | ||
| "`CreatedDate`,`CreatedBy`) VALUES "); | ||
|
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| // INSERT INTO `db_identity`.`m_beneficiaryregidmapping` | ||
| // (`BeneficiaryID`,`Provisioned`,`Deleted`,`CreatedDate`,`CreatedBy`) VALUES | ||
| // (<{BeneficiaryID: }>, <{Provisioned: b'0'}>, <{Deleted: b'0'}>, | ||
| // <{CreatedDate: CURRENT_TIMESTAMP}>, <{CreatedBy: }>); | ||
|
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| Timestamp ts = Timestamp.from(Instant.now()); | ||
| logger.info("BengenApplication.createFile start"); | ||
| long strt = System.currentTimeMillis(); | ||
|
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| for (int i = 0; i < num; i++) { | ||
| sb.append("( "); | ||
| sb.append(g.generateBeneficiaryId()) | ||
| .append(",") | ||
| .append("b'0'") | ||
| .append(",") | ||
| .append("b'0'") | ||
| .append(",") | ||
| .append("'") | ||
| .append(ts) | ||
| .append("',") | ||
| .append("'admin-batch'") | ||
| .append(""); | ||
| sb.append(" ), "); | ||
| } | ||
| Integer count = ConfigProperties.getInteger("no-of-benID-to-be-generate"); | ||
| List<Object[]> batchArgs = createBatchData(count); | ||
|
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| sb.deleteCharAt(sb.lastIndexOf(",")); | ||
| // Batch insert using JdbcTemplate | ||
| String sql = "INSERT INTO `db_identity`.`m_beneficiaryregidmapping` " + | ||
| "(`BeneficiaryID`, `Provisioned`, `Deleted`, `CreatedDate`, `CreatedBy`) " + | ||
| "VALUES (?, b'0', b'0', ?, ?)"; | ||
|
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| jdbcTemplate.execute(sb.toString()); | ||
| for (int i = 0; i < batchArgs.size(); i += BATCH_SIZE) { | ||
| List<Object[]> batch = batchArgs.subList(i, Math.min(i + BATCH_SIZE, batchArgs.size())); | ||
| jdbcTemplate.batchUpdate(sql, batch); | ||
| } | ||
|
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| long fin = System.currentTimeMillis() - strt; | ||
| logger.info("BengenApplication.createQuery finish. time = " + fin + " ms."); | ||
| long fin = System.currentTimeMillis() - strt; | ||
| logger.info("BengenApplication.createFile finish. time = " + fin + " ms."); | ||
| } |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Add error handling and make database name configurable.
The method needs better error handling and the hardcoded database name should be configurable.
public void createFile() {
logger.info("BengenApplication.createFile start");
long strt = System.currentTimeMillis();
Integer count = ConfigProperties.getInteger("no-of-benID-to-be-generate");
+ if (count == null || count <= 0) {
+ logger.error("Invalid or missing configuration for no-of-benID-to-be-generate");
+ throw new IllegalStateException("Invalid beneficiary ID count configuration");
+ }
+
List<Object[]> batchArgs = createBatchData(count);
// Batch insert using JdbcTemplate
- String sql = "INSERT INTO `db_identity`.`m_beneficiaryregidmapping` " +
+ String dbName = ConfigProperties.getString("database.name", "db_identity");
+ String sql = "INSERT INTO `" + dbName + "`.`m_beneficiaryregidmapping` " +
"(`BeneficiaryID`, `Provisioned`, `Deleted`, `CreatedDate`, `CreatedBy`) " +
"VALUES (?, b'0', b'0', ?, ?)";
for (int i = 0; i < batchArgs.size(); i += BATCH_SIZE) {
List<Object[]> batch = batchArgs.subList(i, Math.min(i + BATCH_SIZE, batchArgs.size()));
- jdbcTemplate.batchUpdate(sql, batch);
+ try {
+ jdbcTemplate.batchUpdate(sql, batch);
+ } catch (Exception e) {
+ logger.error("Failed to insert batch starting at index {}: {}", i, e.getMessage());
+ throw new RuntimeException("Batch insert failed", e);
+ }
}
long fin = System.currentTimeMillis() - strt;
logger.info("BengenApplication.createFile finish. time = " + fin + " ms.");
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| public void createFile() { | |
| logger.info("BengenApplication.createFile start"); | |
| long strt = System.currentTimeMillis(); | |
| try { | |
| File file = File.createTempFile("" + System.currentTimeMillis(), ".csv"); | |
| logger.info("File: " + file.getAbsolutePath()); | |
| FileWriter fw = new FileWriter(file); | |
| BufferedWriter bw = new BufferedWriter(fw); | |
| Integer bentobeGenerate = ConfigProperties.getInteger("no-of-benID-to-be-generate"); | |
| bw.write(createQuery(bentobeGenerate).toString()); | |
| bw.flush(); | |
| bw.close(); | |
| } catch (IOException ioe) { | |
| ioe.printStackTrace(); | |
| } | |
| long fin = System.currentTimeMillis() - strt; | |
| logger.info("BengenApplication.createFile finish. time = " + fin + " ms."); | |
| } | |
| public StringBuffer createQuery(Integer num) { | |
| logger.info("BengenApplication.createQuery start"); | |
| long strt = System.currentTimeMillis(); | |
| Generator g = new Generator(); | |
| StringBuffer sb = new StringBuffer( | |
| "INSERT INTO `db_identity`.`m_beneficiaryregidmapping` " + | |
| "(`BeneficiaryID`,`Provisioned`,`Deleted`," + | |
| "`CreatedDate`,`CreatedBy`) VALUES "); | |
| // INSERT INTO `db_identity`.`m_beneficiaryregidmapping` | |
| // (`BeneficiaryID`,`Provisioned`,`Deleted`,`CreatedDate`,`CreatedBy`) VALUES | |
| // (<{BeneficiaryID: }>, <{Provisioned: b'0'}>, <{Deleted: b'0'}>, | |
| // <{CreatedDate: CURRENT_TIMESTAMP}>, <{CreatedBy: }>); | |
| Timestamp ts = Timestamp.from(Instant.now()); | |
| logger.info("BengenApplication.createFile start"); | |
| long strt = System.currentTimeMillis(); | |
| for (int i = 0; i < num; i++) { | |
| sb.append("( "); | |
| sb.append(g.generateBeneficiaryId()) | |
| .append(",") | |
| .append("b'0'") | |
| .append(",") | |
| .append("b'0'") | |
| .append(",") | |
| .append("'") | |
| .append(ts) | |
| .append("',") | |
| .append("'admin-batch'") | |
| .append(""); | |
| sb.append(" ), "); | |
| } | |
| Integer count = ConfigProperties.getInteger("no-of-benID-to-be-generate"); | |
| List<Object[]> batchArgs = createBatchData(count); | |
| sb.deleteCharAt(sb.lastIndexOf(",")); | |
| // Batch insert using JdbcTemplate | |
| String sql = "INSERT INTO `db_identity`.`m_beneficiaryregidmapping` " + | |
| "(`BeneficiaryID`, `Provisioned`, `Deleted`, `CreatedDate`, `CreatedBy`) " + | |
| "VALUES (?, b'0', b'0', ?, ?)"; | |
| jdbcTemplate.execute(sb.toString()); | |
| for (int i = 0; i < batchArgs.size(); i += BATCH_SIZE) { | |
| List<Object[]> batch = batchArgs.subList(i, Math.min(i + BATCH_SIZE, batchArgs.size())); | |
| jdbcTemplate.batchUpdate(sql, batch); | |
| } | |
| long fin = System.currentTimeMillis() - strt; | |
| logger.info("BengenApplication.createQuery finish. time = " + fin + " ms."); | |
| long fin = System.currentTimeMillis() - strt; | |
| logger.info("BengenApplication.createFile finish. time = " + fin + " ms."); | |
| } | |
| public void createFile() { | |
| logger.info("BengenApplication.createFile start"); | |
| long strt = System.currentTimeMillis(); | |
| Integer count = ConfigProperties.getInteger("no-of-benID-to-be-generate"); | |
| if (count == null || count <= 0) { | |
| logger.error("Invalid or missing configuration for no-of-benID-to-be-generate"); | |
| throw new IllegalStateException("Invalid beneficiary ID count configuration"); | |
| } | |
| List<Object[]> batchArgs = createBatchData(count); | |
| // Batch insert using JdbcTemplate | |
| String dbName = ConfigProperties.getString("database.name", "db_identity"); | |
| String sql = "INSERT INTO `" + dbName + "`.`m_beneficiaryregidmapping` " + | |
| "(`BeneficiaryID`, `Provisioned`, `Deleted`, `CreatedDate`, `CreatedBy`) " + | |
| "VALUES (?, b'0', b'0', ?, ?)"; | |
| for (int i = 0; i < batchArgs.size(); i += BATCH_SIZE) { | |
| List<Object[]> batch = batchArgs.subList(i, Math.min(i + BATCH_SIZE, batchArgs.size())); | |
| try { | |
| jdbcTemplate.batchUpdate(sql, batch); | |
| } catch (Exception e) { | |
| logger.error("Failed to insert batch starting at index {}: {}", i, e.getMessage()); | |
| throw new RuntimeException("Batch insert failed", e); | |
| } | |
| } | |
| long fin = System.currentTimeMillis() - strt; | |
| logger.info("BengenApplication.createFile finish. time = " + fin + " ms."); | |
| } |
🤖 Prompt for AI Agents
In src/main/java/com/iemr/common/bengen/service/GenerateBeneficiaryService.java
around lines 73 to 92, the createFile method lacks error handling and uses a
hardcoded database name in the SQL insert statement. To fix this, wrap the batch
insert logic in a try-catch block to handle and log any exceptions that occur
during database operations. Also, replace the hardcoded database name with a
configurable property fetched from configuration files or environment variables,
ensuring the SQL statement dynamically uses this configurable database name.
| protected BigInteger generateNumN(int n) { | ||
| int[] source = new int[n]; | ||
| int[] target = new int[n]; | ||
|
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| for (int i = 0; i < n; i++) { | ||
| source[i] = getRandomDigit(); | ||
| } | ||
|
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| for (int i = 0, j = n - 1; i < n; i++, j--) { | ||
| int num = (j == 0) ? getRandomDigit() : getRandomDigit() % j; | ||
| target[j] = source[i]; | ||
| source[i] = num; | ||
| } | ||
|
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| StringBuilder sb = new StringBuilder(n); | ||
| for (int value : target) { | ||
| sb.append(value); | ||
| } | ||
|
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||
| return new BigInteger(sb.toString()); | ||
| } |
There was a problem hiding this comment.
Critical: Incorrect shuffling algorithm that doesn't preserve all digits.
The current implementation has a logical error in the shuffling algorithm. At line 82, source[i] = num overwrites the original value without preserving it for potential future swaps. This means some digits will be lost and others duplicated, not creating a true permutation.
If the intent is to generate a random n-digit number, consider this simpler approach:
protected BigInteger generateNumN(int n) {
- int[] source = new int[n];
- int[] target = new int[n];
-
- for (int i = 0; i < n; i++) {
- source[i] = getRandomDigit();
- }
-
- for (int i = 0, j = n - 1; i < n; i++, j--) {
- int num = (j == 0) ? getRandomDigit() : getRandomDigit() % j;
- target[j] = source[i];
- source[i] = num;
- }
-
- StringBuilder sb = new StringBuilder(n);
- for (int value : target) {
- sb.append(value);
- }
-
- return new BigInteger(sb.toString());
+ StringBuilder sb = new StringBuilder(n);
+ for (int i = 0; i < n; i++) {
+ sb.append(getRandomDigit());
+ }
+ return new BigInteger(sb.toString());
}Or if you need a shuffled permutation of digits 0-9:
protected BigInteger generateNumN(int n) {
- int[] source = new int[n];
- int[] target = new int[n];
-
- for (int i = 0; i < n; i++) {
- source[i] = getRandomDigit();
- }
-
- for (int i = 0, j = n - 1; i < n; i++, j--) {
- int num = (j == 0) ? getRandomDigit() : getRandomDigit() % j;
- target[j] = source[i];
- source[i] = num;
- }
-
- StringBuilder sb = new StringBuilder(n);
- for (int value : target) {
- sb.append(value);
- }
-
- return new BigInteger(sb.toString());
+ List<Integer> digits = IntStream.range(0, 10).boxed().collect(Collectors.toList());
+ Collections.shuffle(digits, new SecureRandom());
+
+ StringBuilder sb = new StringBuilder(n);
+ for (int i = 0; i < n; i++) {
+ sb.append(digits.get(i));
+ }
+ return new BigInteger(sb.toString());
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| protected BigInteger generateNumN(int n) { | |
| int[] source = new int[n]; | |
| int[] target = new int[n]; | |
| for (int i = 0; i < n; i++) { | |
| source[i] = getRandomDigit(); | |
| } | |
| for (int i = 0, j = n - 1; i < n; i++, j--) { | |
| int num = (j == 0) ? getRandomDigit() : getRandomDigit() % j; | |
| target[j] = source[i]; | |
| source[i] = num; | |
| } | |
| StringBuilder sb = new StringBuilder(n); | |
| for (int value : target) { | |
| sb.append(value); | |
| } | |
| return new BigInteger(sb.toString()); | |
| } | |
| protected BigInteger generateNumN(int n) { | |
| StringBuilder sb = new StringBuilder(n); | |
| for (int i = 0; i < n; i++) { | |
| sb.append(getRandomDigit()); | |
| } | |
| return new BigInteger(sb.toString()); | |
| } |
| protected BigInteger generateNumN(int n) { | |
| int[] source = new int[n]; | |
| int[] target = new int[n]; | |
| for (int i = 0; i < n; i++) { | |
| source[i] = getRandomDigit(); | |
| } | |
| for (int i = 0, j = n - 1; i < n; i++, j--) { | |
| int num = (j == 0) ? getRandomDigit() : getRandomDigit() % j; | |
| target[j] = source[i]; | |
| source[i] = num; | |
| } | |
| StringBuilder sb = new StringBuilder(n); | |
| for (int value : target) { | |
| sb.append(value); | |
| } | |
| return new BigInteger(sb.toString()); | |
| } | |
| protected BigInteger generateNumN(int n) { | |
| List<Integer> digits = IntStream.range(0, 10).boxed().collect(Collectors.toList()); | |
| Collections.shuffle(digits, new SecureRandom()); | |
| StringBuilder sb = new StringBuilder(n); | |
| for (int i = 0; i < n; i++) { | |
| sb.append(digits.get(i)); | |
| } | |
| return new BigInteger(sb.toString()); | |
| } |
🤖 Prompt for AI Agents
In src/main/java/com/iemr/common/bengen/utils/Generator.java between lines 71
and 91, the current shuffling logic overwrites elements in the source array
causing loss of digits and duplicates, thus not producing a valid permutation.
To fix this, replace the flawed shuffle with a proper algorithm like the
Fisher-Yates shuffle that swaps elements without overwriting, ensuring all
original digits are preserved and randomly permuted. Alternatively, if the goal
is just to generate a random n-digit number, simplify by directly generating
each digit without attempting to shuffle arrays.
| private int getRandomDigit() { | ||
| SecureRandom secureRandom = new SecureRandom(); | ||
| return secureRandom.nextInt(10); | ||
|
|
||
| } |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Performance issue: Creating SecureRandom instance on every call.
Creating a new SecureRandom instance for each random digit is inefficient. Consider using a shared instance or ThreadLocalRandom for better performance in concurrent scenarios.
+private static final SecureRandom SECURE_RANDOM = new SecureRandom();
+
private int getRandomDigit() {
- SecureRandom secureRandom = new SecureRandom();
- return secureRandom.nextInt(10);
+ return SECURE_RANDOM.nextInt(10);
}Or for better thread safety in parallel streams:
private int getRandomDigit() {
- SecureRandom secureRandom = new SecureRandom();
- return secureRandom.nextInt(10);
+ return ThreadLocalRandom.current().nextInt(10);
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| private int getRandomDigit() { | |
| SecureRandom secureRandom = new SecureRandom(); | |
| return secureRandom.nextInt(10); | |
| } | |
| // Reuse a single SecureRandom instance instead of creating one per call | |
| private static final SecureRandom SECURE_RANDOM = new SecureRandom(); | |
| private int getRandomDigit() { | |
| return SECURE_RANDOM.nextInt(10); | |
| } |
🤖 Prompt for AI Agents
In src/main/java/com/iemr/common/bengen/utils/Generator.java around lines 99 to
103, the method getRandomDigit creates a new SecureRandom instance on every
call, which is inefficient. To fix this, create a single shared SecureRandom
instance as a static final field in the class and reuse it in the method, or
alternatively use ThreadLocalRandom.current().nextInt(10) for better performance
and thread safety in concurrent scenarios.
| private int getRandomInRange(int min, int max) { | ||
| SecureRandom sr = new SecureRandom(); | ||
| if (min > max) { | ||
| throw new IllegalArgumentException("min must be <= max"); | ||
| } | ||
| if (max == Integer.MAX_VALUE) { | ||
| return sr.nextInt(max - min) + min; | ||
| } | ||
| return sr.nextInt(min, max + 1); // safe here | ||
| } |
There was a problem hiding this comment.
Fix incorrect MAX_VALUE handling and SecureRandom instantiation.
Two issues:
- Line 111: When
max == Integer.MAX_VALUE, the result excludesmaxfrom the range - Creating new
SecureRandominstance is inefficient
+private static final SecureRandom SECURE_RANDOM = new SecureRandom();
+
private int getRandomInRange(int min, int max) {
- SecureRandom sr = new SecureRandom();
if (min > max) {
throw new IllegalArgumentException("min must be <= max");
}
if (max == Integer.MAX_VALUE) {
- return sr.nextInt(max - min) + min;
+ // Handle MAX_VALUE case - use long to avoid overflow
+ return SECURE_RANDOM.nextInt(max - min + 1) + min;
}
- return sr.nextInt(min, max + 1); // safe here
+ return SECURE_RANDOM.nextInt(min, max + 1);
}Committable suggestion skipped: line range outside the PR's diff.
🤖 Prompt for AI Agents
In src/main/java/com/iemr/common/bengen/utils/Generator.java lines 105 to 114,
fix the getRandomInRange method by reusing a single SecureRandom instance
instead of creating a new one each call to improve efficiency. Also, correct the
logic for the case when max equals Integer.MAX_VALUE to ensure the max value is
included in the random range by adjusting the bounds accordingly.
|
2 participants
📋 Description
JIRA ID: AMM-1187
Skips writing to file. Directly generates and inserts into DB.
Prevents out-of-memory errors or timeouts when handling large volumes.
Improves database throughput and stability.
Makes the load on the DB more manageable.
✅ Type of Change
ℹ️ Additional Information
Please describe how the changes were tested, and include any relevant screenshots, logs, or other information that provides additional context.
Summary by CodeRabbit
Refactor
Tests