Add clean-history-on-start and total-size-cap rolling policy properties for Log4j2

Add CLEAN_HISTORY_ON_START and TOTAL_SIZE_CAP to Log4j2's
RollingPolicySystemProperty enum so that log4j2 users can configure
these rolling policy settings via application properties, matching the
existing support in logback's RollingPolicySystemProperty.

See gh-46468

Signed-off-by: yangzhice <a13644015167@qq.com>

Author: elephant-y

core/spring-boot/src/main/java/org/springframework/boot/logging/log4j2/Log4j2LoggingSystemProperties.java

@@ -63,7 +63,9 @@ protected void apply(@Nullable LogFile logFile, PropertyResolver resolver) {
 
 	private void applyRollingPolicyProperties(PropertyResolver resolver) {
 		applyRollingPolicy(RollingPolicySystemProperty.FILE_NAME_PATTERN, resolver);
+		applyRollingPolicy(RollingPolicySystemProperty.CLEAN_HISTORY_ON_START, resolver, Boolean.class);
 		applyRollingPolicy(RollingPolicySystemProperty.MAX_FILE_SIZE, resolver, DataSize.class);
+		applyRollingPolicy(RollingPolicySystemProperty.TOTAL_SIZE_CAP, resolver, DataSize.class);
 		applyRollingPolicy(RollingPolicySystemProperty.MAX_HISTORY, resolver);
 		applyRollingPolicy(RollingPolicySystemProperty.STRATEGY, resolver);
 		applyRollingPolicy(RollingPolicySystemProperty.TIME_INTERVAL, resolver, Integer.class);

core/spring-boot/src/main/java/org/springframework/boot/logging/log4j2/RollingPolicySystemProperty.java

@@ -61,7 +61,17 @@ public enum RollingPolicySystemProperty {
 	/**
 	 * Logging system property for the cron based schedule.
 	 */
-	CRON("cron");
+	CRON("cron"),
+
+	/**
+	 * Logging system property for the clean history on start flag.
+	 */
+	CLEAN_HISTORY_ON_START("clean-history-on-start"),
+
+	/**
+	 * Logging system property for the file total size cap.
+	 */
+	TOTAL_SIZE_CAP("total-size-cap");
 
 	private final String environmentVariableName;
 

core/spring-boot/src/test/java/org/springframework/boot/logging/log4j2/Log4j2LoggingSystemPropertiesTests.java

@@ -68,6 +68,8 @@ void appliesLog4j2RollingPolicyProperties() {
 		this.environment.setProperty("logging.log4j2.rollingpolicy.time-interval", "2");
 		this.environment.setProperty("logging.log4j2.rollingpolicy.time-modulate", "true");
 		this.environment.setProperty("logging.log4j2.rollingpolicy.cron", "0 0 1 * * ?");
+		this.environment.setProperty("logging.log4j2.rollingpolicy.clean-history-on-start", "true");
+		this.environment.setProperty("logging.log4j2.rollingpolicy.total-size-cap", "1GB");
 
 		new Log4j2LoggingSystemProperties(this.environment).apply(null);
 
@@ -78,7 +80,9 @@ void appliesLog4j2RollingPolicyProperties() {
 			.containsEntry("LOG4J2_ROLLINGPOLICY_STRATEGY", "time")
 			.containsEntry("LOG4J2_ROLLINGPOLICY_TIME_INTERVAL", "2")
 			.containsEntry("LOG4J2_ROLLINGPOLICY_TIME_MODULATE", "true")
-			.containsEntry("LOG4J2_ROLLINGPOLICY_CRON", "0 0 1 * * ?");
+			.containsEntry("LOG4J2_ROLLINGPOLICY_CRON", "0 0 1 * * ?")
+			.containsEntry("LOG4J2_ROLLINGPOLICY_CLEAN_HISTORY_ON_START", "true")
+			.containsEntry("LOG4J2_ROLLINGPOLICY_TOTAL_SIZE_CAP", String.valueOf(DataSize.ofGigabytes(1).toBytes()));
 	}
 
 	@Test