Expose evictable idle time for a connection

ballerina/http_client_connection_pool.bal

@@ -27,11 +27,15 @@ configurable int maxActiveStreamsPerConnection = 100;
 # + maxIdleConnections - Maximum number of idle connections allowed per pool.
 # + waitTime - Maximum amount of time (in seconds), the client should wait for an idle connection before it sends an error when the pool is exhausted
 # + maxActiveStreamsPerConnection - Maximum active streams per connection. This only applies to HTTP/2. Default value is 100
+# + minEvictableIdleTime - Minimum evictable time for an idle connection in seconds. Default value is 5 minutes
+# + timeBetweenEvictionRuns - Time between eviction runs in seconds. Default value is 30 seconds
 public type PoolConfiguration record {|
     int maxActiveConnections = maxActiveConnections;
     int maxIdleConnections = maxIdleConnections;
     decimal waitTime = waitTime;
     int maxActiveStreamsPerConnection = maxActiveStreamsPerConnection;
+    decimal minEvictableIdleTime = 300;
+    decimal timeBetweenEvictionRuns = 30;
 |};
 //This is a hack to get the global map initialized, without involving locking.
 class ConnectionManager {

changelog.md

@@ -5,6 +5,11 @@ This file contains all the notable changes done to the Ballerina HTTP package th
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to 
 [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Added
+- [Expose HTTP connection eviction configurations in the client level](https://github.com/ballerina-platform/ballerina-library/issues/5951)
+
 ## [2.10.5] - 2023-12-06
 
 ### Fixed

native/src/main/java/io/ballerina/stdlib/http/api/HttpConstants.java

@@ -506,6 +506,10 @@ public final class HttpConstants {
     public static final BString CONNECTION_POOLING_WAIT_TIME = StringUtils.fromString("waitTime");
     public static final BString CONNECTION_POOLING_MAX_ACTIVE_STREAMS_PER_CONNECTION = StringUtils.fromString(
             "maxActiveStreamsPerConnection");
+    public static final BString CONNECTION_POOLING_EVICTABLE_IDLE_TIME = StringUtils.fromString(
+            "minEvictableIdleTime");
+    public static final BString CONNECTION_POOLING_TIME_BETWEEN_EVICTION_RUNS = StringUtils.fromString(
+            "timeBetweenEvictionRuns");
     public static final String HTTP_CLIENT_CONNECTION_POOL = "PoolConfiguration";
     public static final String CONNECTION_MANAGER = "ConnectionManager";
     public static final int POOL_CONFIG_INDEX = 1;

native/src/main/java/io/ballerina/stdlib/http/api/HttpUtil.java

@@ -1352,6 +1352,15 @@ public static void populatePoolingConfig(BMap poolRecord, PoolConfiguration pool
                 maxActiveStreamsPerConnection == -1 ? Integer.MAX_VALUE : validateConfig(
                         maxActiveStreamsPerConnection,
                         HttpConstants.CONNECTION_POOLING_MAX_ACTIVE_STREAMS_PER_CONNECTION.getValue()));
+
+        double minEvictableIdleTime =
+                ((BDecimal) poolRecord.get(HttpConstants.CONNECTION_POOLING_EVICTABLE_IDLE_TIME)).floatValue();
+        poolConfiguration.setMinEvictableIdleTime(minEvictableIdleTime < 0 ? 0 : (long) minEvictableIdleTime * 1000);
+
+        double timeBetweenEvictionRuns =
+                ((BDecimal) poolRecord.get(HttpConstants.CONNECTION_POOLING_TIME_BETWEEN_EVICTION_RUNS)).floatValue();
+        poolConfiguration.setTimeBetweenEvictionRuns(
+                timeBetweenEvictionRuns < 0 ? 0 : (long) timeBetweenEvictionRuns * 1000);
     }
 
     private static int validateConfig(long value, String configName) {