Added empty metrics by default

core/src/commonMain/kotlin/com/xebia/functional/xef/metrics/LogsMetric.kt

@@ -6,25 +6,25 @@ import io.ktor.util.date.*
 
 class LogsMetric : Metric {
 
-  private val identSize = 4
+  private val indentSize = 4
 
   override suspend fun <A> promptSpan(
     conversation: Conversation,
     prompt: Prompt,
     block: suspend Metric.() -> A
   ): A {
-    val milis = getTimeMillis()
+    val millis = getTimeMillis()
     val name = prompt.messages.lastOrNull()?.content ?: "empty"
     println("Prompt-Span: $name")
-    println("${writeIdent()}|-- Conversation Id: ${conversation.conversationId?.value ?: "empty"}")
+    println("${writeIndent()}|-- Conversation Id: ${conversation.conversationId?.value ?: "empty"}")
     val output = block()
-    println("${writeIdent()}|-- Finished in ${getTimeMillis()-milis} ms")
+    println("${writeIndent()}|-- Finished in ${getTimeMillis() - millis} ms")
     return output
   }
 
   override fun log(conversation: Conversation, message: String) {
-    println("${writeIdent()}|-- $message")
+    println("${writeIndent()}|-- $message")
   }
 
-  private fun writeIdent(times: Int = 1) = (1..identSize * times).fold("") { a, b -> "$a " }
+  private fun writeIndent(times: Int = 1) = (1..indentSize * times).fold("") { a, b -> "$a " }
 }

core/src/commonMain/kotlin/com/xebia/functional/xef/metrics/Metric.kt

@@ -11,4 +11,17 @@ interface Metric {
   ): A
 
   fun log(conversation: Conversation, message: String)
+
+  companion object {
+    val EMPTY: Metric =
+      object : Metric {
+        override suspend fun <A> promptSpan(
+          conversation: Conversation,
+          prompt: Prompt,
+          block: suspend Metric.() -> A
+        ): A = block()
+
+        override fun log(conversation: Conversation, message: String) {}
+      }
+  }
 }

examples/kotlin/src/main/kotlin/com/xebia/functional/xef/conversation/conversations/Animal.kt

@@ -5,6 +5,7 @@ import com.xebia.functional.xef.conversation.MessagesToHistory
 import com.xebia.functional.xef.conversation.llm.openai.OpenAI
 import com.xebia.functional.xef.conversation.llm.openai.prompt
 import com.xebia.functional.xef.conversation.llm.openai.promptMessage
+import com.xebia.functional.xef.metrics.LogsMetric
 import com.xebia.functional.xef.prompt.Prompt
 import com.xebia.functional.xef.prompt.configuration.PromptConfiguration
 import com.xebia.functional.xef.prompt.templates.system
@@ -29,7 +30,7 @@ suspend fun main() {
     messagePolicy { addMessagesFromConversation = MessagesFromHistory.NONE }
   }
 
-  OpenAI.conversation {
+  OpenAI.conversation(metric = LogsMetric()) {
     val animal: Animal =
       prompt<Animal>(
         Prompt { +user("A unique animal species.") }
@@ -42,10 +43,8 @@ suspend fun main() {
           .copy(configuration = configNoneFromConversation)
       )
 
-    println()
-    println("Animal: $animal")
+    println("\nAnimal: $animal")
     println("Invention: $invention")
-    println()
 
     val storyPrompt =
       Prompt {
@@ -61,22 +60,14 @@ suspend fun main() {
 
     val story: String = promptMessage(storyPrompt)
 
-    println()
-    println("Story 1:")
-    println()
-    println(story)
-    println()
-    println()
+    println("\nStory 1:\n$story\n")
 
     val storyPrompt2 = Prompt {
       +user("Write a short story of 100 words that involves the animal in a city called Cadiz")
     }
 
     val story2: String = promptMessage(storyPrompt2)
 
-    println()
-    println("Story 2:")
-    println()
-    println(story2)
+    println("\nStory 2:\n$story2\n")
   }
 }

gpt4all-kotlin/src/jvmMain/kotlin/com/xebia/functional/gpt4all/Conversation.kt

@@ -8,6 +8,6 @@ import com.xebia.functional.xef.store.VectorStore
 
 suspend inline fun <A> conversation(
     store: VectorStore = LocalVectorStore(HuggingFaceLocalEmbeddings.DEFAULT),
-    metric: Metric = LogsMetric(),
+    metric: Metric = Metric.EMPTY,
     noinline block: suspend Conversation.() -> A
 ): A = block(Conversation(store, metric))

gpt4all-kotlin/src/jvmMain/kotlin/com/xebia/functional/gpt4all/GPT4All.kt

@@ -40,7 +40,8 @@ interface GPT4All : AutoCloseable, Chat, Completion {
 
     @JvmSynthetic
     suspend inline fun <A> conversation(
-      store: VectorStore,
+      store: VectorStore = LocalVectorStore(HuggingFaceLocalEmbeddings.DEFAULT),
+      metric: Metric = Metric.EMPTY,
       noinline block: suspend Conversation.() -> A
     ): A = block(conversation(store))
 
@@ -53,7 +54,7 @@ interface GPT4All : AutoCloseable, Chat, Completion {
     @JvmOverloads
     fun conversation(
       store: VectorStore = LocalVectorStore(HuggingFaceLocalEmbeddings.DEFAULT),
-      metric: Metric = LogsMetric()
+      metric: Metric = Metric.EMPTY
     ): PlatformConversation = Conversation(store, metric)
 
     operator fun invoke(

integrations/gcp/src/commonMain/kotlin/com/xebia/functional/xef/gcp/GCP.kt

@@ -9,7 +9,6 @@ import com.xebia.functional.xef.env.getenv
 import com.xebia.functional.xef.gcp.models.GcpChat
 import com.xebia.functional.xef.gcp.models.GcpEmbeddings
 import com.xebia.functional.xef.llm.LLM
-import com.xebia.functional.xef.metrics.LogsMetric
 import com.xebia.functional.xef.metrics.Metric
 import com.xebia.functional.xef.store.LocalVectorStore
 import com.xebia.functional.xef.store.VectorStore
@@ -63,8 +62,8 @@ class GCP(projectId: String? = null, location: VertexAIRegion? = null, token: St
 
     @JvmSynthetic
     suspend inline fun <A> conversation(
-      store: VectorStore,
-      metric: Metric,
+      store: VectorStore = LocalVectorStore(FromEnvironment.DEFAULT_EMBEDDING),
+      metric: Metric = Metric.EMPTY,
       noinline block: suspend Conversation.() -> A
     ): A = block(conversation(store, metric))
 
@@ -76,10 +75,7 @@ class GCP(projectId: String? = null, location: VertexAIRegion? = null, token: St
     @JvmOverloads
     fun conversation(
       store: VectorStore = LocalVectorStore(FromEnvironment.DEFAULT_EMBEDDING),
-      metric: Metric = LogsMetric(),
+      metric: Metric = Metric.EMPTY,
     ): PlatformConversation = Conversation(store, metric)
   }
 }
-
-suspend inline fun <A> GCP.conversation(noinline block: suspend Conversation.() -> A): A =
-  block(Conversation(LocalVectorStore(DEFAULT_EMBEDDING), LogsMetric()))

kotlin/src/commonMain/kotlin/com/xebia/functional/xef/conversation/DSLExtensions.kt

@@ -1,7 +1,6 @@
 package com.xebia.functional.xef.conversation
 
 import com.xebia.functional.xef.llm.Embeddings
-import com.xebia.functional.xef.metrics.LogsMetric
 import com.xebia.functional.xef.metrics.Metric
 import com.xebia.functional.xef.store.LocalVectorStore
 import com.xebia.functional.xef.store.VectorStore
@@ -17,6 +16,6 @@ import com.xebia.functional.xef.store.VectorStore
 suspend inline fun <A> conversation(
   embeddings: Embeddings,
   store: VectorStore = LocalVectorStore(embeddings),
-  metric: Metric = LogsMetric(),
+  metric: Metric = Metric.EMPTY,
   noinline block: suspend Conversation.() -> A
 ): A = block(Conversation(store, metric))

openai/src/commonMain/kotlin/com/xebia/functional/xef/conversation/llm/openai/OpenAI.kt

@@ -20,7 +20,6 @@ import com.xebia.functional.xef.conversation.autoClose
 import com.xebia.functional.xef.conversation.llm.openai.models.*
 import com.xebia.functional.xef.env.getenv
 import com.xebia.functional.xef.llm.LLM
-import com.xebia.functional.xef.metrics.LogsMetric
 import com.xebia.functional.xef.metrics.Metric
 import com.xebia.functional.xef.store.LocalVectorStore
 import com.xebia.functional.xef.store.VectorStore
@@ -215,8 +214,8 @@ class OpenAI(
 
     @JvmSynthetic
     suspend inline fun <A> conversation(
-      store: VectorStore,
-      metric: Metric,
+      store: VectorStore = LocalVectorStore(FromEnvironment.DEFAULT_EMBEDDING),
+      metric: Metric = Metric.EMPTY,
       noinline block: suspend Conversation.() -> A
     ): A = block(conversation(store, metric))
 
@@ -227,7 +226,7 @@ class OpenAI(
     @JvmOverloads
     fun conversation(
       store: VectorStore = LocalVectorStore(FromEnvironment.DEFAULT_EMBEDDING),
-      metric: Metric = LogsMetric()
+      metric: Metric = Metric.EMPTY
     ): PlatformConversation = Conversation(store, metric)
   }
 }