Formatted AccessLog

core/build.gradle

@@ -66,6 +66,7 @@ dependencies {
     implementation libraries.grpc_stub
     implementation libraries.grpc_services
     implementation libraries.lombok
+    implementation 'org.apache.commons:commons-text:1.12.0'
 
 
     testImplementation libraries.junit4

core/src/main/java/com/flipkart/gjex/core/context/AccessLogContext.java

@@ -0,0 +1,36 @@
+package com.flipkart.gjex.core.context;
+
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.SneakyThrows;
+import org.apache.commons.text.StringSubstitutor;
+
+import java.lang.reflect.Field;
+import java.util.HashMap;
+import java.util.Map;
+
+@AllArgsConstructor
+public class AccessLogContext {
+    String clientIp;
+    String resourcePath;
+    Integer contentLength;
+    Long responseTime;
+    Map<String,String> headers;
+
+    @SneakyThrows
+    Map<String,Object> getValueMap() {
+        Map<String, Object> params = new HashMap<>();
+        for (Field field : this.getClass().getDeclaredFields()) {
+            params.put(field.getName(), field.get(this));
+        }
+        for (Map.Entry<String, String> entry : headers.entrySet()) {
+            params.put("headers." + entry.getKey(), entry.getValue());
+        }
+        return params;
+    }
+
+    public String format(String templateFormat) {
+        return StringSubstitutor.replace(templateFormat, getValueMap(), "{", "}");
+    }
+}

core/src/test/java/com/flipkart/gjex/core/context/AccessLogContextTest.java

@@ -0,0 +1,23 @@
+package com.flipkart.gjex.core.context;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.Map;
+
+public class AccessLogContextTest {
+
+    @Before
+    public void setUp() {
+    }
+
+    private String template = "Formatted {clientIp} {resourcePath} {contentLength} {responseTime} {headers.x-header}";
+
+    @Test
+    public void testSimpleRender() {
+        AccessLogContext context = new AccessLogContext("127.0.0.1", "/path", 100, 1000L, Map.of("x-header", "value"));
+        String result = context.format(template);
+        Assert.assertEquals("Formatted 127.0.0.1 /path 100 1000 value", result);
+    }
+}