Document Logging Guidelines

Issue-ID: CPS-604
Signed-off-by: sourabh_sourabh <sourabh.sourabh@est.tech>
Change-Id: I7bf1cf8b57595e6fe9def00777c294bb90c5dc11

2 files changed, 117 insertions, 0 deletions

diff --git a/docs/admin-guide.rst b/docs/admin-guide.rst
index 7689ee5b6d..203151bf8f 100644
--- a/docs/admin-guide.rst
+++ b/docs/admin-guide.rst
@@ -12,6 +12,123 @@ CPS Admin Guide
 .. toctree::
    :maxdepth: 1
 
+Logging Configuration
+=====================
+
+.. note::
+   Default logging level of "logging.level.org.onap.cps" is set to "INFO".
+
+.. code-block:: bash
+
+   logging:
+    level:
+        org:
+            springframework: INFO
+            onap:
+                cps: INFO
+
+CPS Log pattern
+---------------
+
+.. code-block:: java
+
+   <pattern>
+	   {
+	     "timestamp" : "%timestamp", // 2022-01-28 18:39:17.768
+	     "severity": "%level",   // DEBUG
+	     "service": "${springAppName}",  // cps-application
+	     "trace": "${TraceId}", // e17da1571e518c59
+	     "span": "${SpanId}", // e17da1571e518c59
+	     "pid": "${PID}", //11128
+	     "thread": "%thread", //tp1901272535-29
+	     "class": "%logger{40}", .// o.onap.cps.aop.CpsLoggingAspectService
+	     "rest": "%message" // Execution time ...
+	   }
+   </pattern>
+
+Change logging level
+--------------------
+
+.. container:: ulist
+
+- Curl command 1. Check current log level of "logging.level.org.onap.cps" if it is set to it's default value (INFO)
+
+.. code-block:: java
+
+    curl --location --request GET 'http://{cps-service-name:cps-management-port}/manage/loggers/org.onap.cps' \
+    --header 'Content-Type: application/json; charset=utf-8'
+
+    Response body : HTTP Status 200
+
+    {
+        "configuredLevel": "INFO",
+        "effectiveLevel": "INFO"
+    }
+
+- Curl command 2. Change logging level of "logging.level.org.onap.cps" to "DEBUG"
+
+.. note::
+   Below-mentioned endpoint  will change the log level at runtime. After executing the curl command "effectiveLevel" will set and applied immediately without restarting CPS service.
+
+.. code-block:: java
+
+    curl --location --request POST 'http://{cps-service-name:cps-management-port}/manage/loggers/org.onap.cps' \
+    --header 'Content-Type: application/json; charset=utf-8' \
+    --data-raw '{
+                    "configuredLevel": "DEBUG"
+                }'
+
+    Response body : HTTP Status 204
+
+- Curl command 3. Verify if log level of "logging.level.org.onap.cps" is changed from 'INFO' to 'DEBUG'
+
+.. code-block:: java
+
+    curl --location --request GET 'http://{cps-service-name:cps-management-port}/manage/loggers/org.onap.cps' \
+    --header 'Content-Type: application/json; charset=utf-8'
+
+    Response body : HTTP Status 200
+
+    {
+    "configuredLevel": "DEBUG",
+    "effectiveLevel": "DEBUG"
+    }
+
+Location of log files
+---------------------
+By default, Spring Boot will only log to the console and will not write log files.
+
+.. image:: images/cps-service-console.JPG
+  :width: 700
+  :alt: CPS service console
+
+Measure Execution Time of CPS Service
+-------------------------------------
+
+.. note::
+   Make sure effective log level of "logging.level.org.onap.cps" is 'DEBUG'. This can be verified by executing curl command 3.
+
+Execute CPS service that you want to calculate total elapsed time and log as shown below
+
+.. code-block:: xml
+
+   2022-01-28 18:39:17.679 DEBUG [cps-application,e17da1571e518c59,e17da1571e518c59] 11128 --- [tp1901272535-29] o.onap.cps.aop.CpsLoggingAspectService   : Execution time of : DataspaceRepository.getByName() with argument[s] = [test42] having result = org.onap.cps.spi.entities.DataspaceEntity@68ded236 :: 205 ms
+
+   2022-01-28 18:39:17.726 DEBUG [cps-application,e17da1571e518c59,e17da1571e518c59] 11128 --- [tp1901272535-29] o.onap.cps.aop.CpsLoggingAspectService   : Execution time of : AnchorRepository.getByDataspaceAndName() with argument[s] = [org.onap.cps.spi.entities.DataspaceEntity@68ded236, bookstore] having result = org.onap.cps.spi.entities.AnchorEntity@71c47fb1 :: 46 ms
+
+   2022-01-28 18:39:17.768 DEBUG [cps-application,e17da1571e518c59,e17da1571e518c59] 11128 --- [tp1901272535-29] o.onap.cps.aop.CpsLoggingAspectService   : Execution time of : CpsAdminPersistenceServiceImpl.getAnchor() with argument[s] = [test42, bookstore] having result = Anchor(name=bookstore, dataspaceName=test42, schemaSetName=bookstore) :: 299 ms
+
+   2022-01-28 18:39:17.768 DEBUG [cps-application,e17da1571e518c59,e17da1571e518c59] 11128 --- [tp1901272535-29] o.onap.cps.aop.CpsLoggingAspectService   : Execution time of : CpsAdminServiceImpl.getAnchor() with argument[s] = [test42, bookstore] having result = Anchor(name=bookstore, dataspaceName=test42, schemaSetName=bookstore) :: 305 ms
+
+   2022-01-28 18:39:17.843 DEBUG [cps-application,e17da1571e518c59,e17da1571e518c59] 11128 --- [tp1901272535-29] o.onap.cps.aop.CpsLoggingAspectService   : Execution time of : AdminRestController.getAnchor() with argument[s] = [test42, bookstore] having result = <200 OK OK,class AnchorDetails {
+    name: bookstore
+    dataspaceName: test42
+    schemaSetName: bookstore
+   },[]> :: 419 ms
+
+.. warning::
+   Revert logging level of "logging.level.org.onap.cps" to 'INFO' again to prevent unnecessary logging and impacts on performance.
+
 .. Below Label is used by documentation for other CPS components to link here, do not remove even if it gives a warning
 .. _cps_common_logging:
 
diff --git a/docs/images/cps-service-console.JPG b/docs/images/cps-service-console.JPG
new file mode 100644
index 0000000000..964e5b67b1
--- /dev/null
+++ b/docs/images/cps-service-console.JPG