[jira] [Created] (TS-3881) new TS API TSHttpTxnCacheStateGet

["Sudheer Vinukonda (JIRA)" <ji...@apache.org>]

Sudheer Vinukonda created TS-3881:
-------------------------------------

             Summary: new TS API TSHttpTxnCacheStateGet
                 Key: TS-3881
                 URL: https://issues.apache.org/jira/browse/TS-3881
             Project: Traffic Server
          Issue Type: New Feature
          Components: TS API
            Reporter: Sudheer Vinukonda


I'd like to add a new API TSHttpTxnCacheStateGet() to be able to get more insight into cache operations (e.g read_while_write, open read tries, open write tries, cache volume used etc) on a given Txn. 

Below's the proposal with the info I'd like the new API return along with the API signature.

Please provide comments/suggestions.

{code}
+typedef enum {
+  TS_CACHE_TXN_STATE_HIT_RAM,
+  TS_CACHE_TXN_STATE_READ_WHILE_WRITER,
+  TS_CACHE_TXN_STATE_OPEN_READ_TRIES,
+  TS_CACHE_TXN_STATE_OPEN_WRITE_TRIES,
+  TS_CACHE_TXN_STATE_CACHE_VOLUME,
+  TS_CACHE_TXN_STATE_LAST_ENTRY
+} TSCacheTxnStateKey;
+

+/* Get Cache Lookup state, useful for understanding how a lookup was performed */
+/**
+   Return the particular cache lookup info requested.
+
+   @param txnp the transaction pointer
+   @param key the requested cache lookup info.
+   @param TSMgmtInt a pointer to a integer where we will store the metric value
+
+   @return @c TS_SUCCESS if the metric is supported, TS_ERROR otherwise
+
+*/
+tsapi TSReturnCode TSHttpTxnCacheStateGet(TSHttpTxn txnp, TSCacheStateKey key, TSMgmtInt *value);

{code}
+




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