Add e2e test with WebCrawler + embeddings + vector sink + completions (…

…#444)

langstream-e2e-tests/src/test/java/ai/langstream/tests/BaseEndToEndTest.java

@@ -281,7 +281,11 @@ protected static ConsumeGatewayMessage consumeOneMessageFromGateway(
                 "bin/langstream gateway consume %s %s %s -n 1"
                         .formatted(applicationId, gatewayId, String.join(" ", extraArgs));
         final String response = executeCommandOnClient(command);
-        final String secondLine = response.lines().collect(Collectors.toList()).get(1);
+        final List<String> lines = response.lines().collect(Collectors.toList());
+        if (lines.size() <= 1) {
+            return null;
+        }
+        final String secondLine = lines.get(1);
         return ConsumeGatewayMessage.readValue(secondLine);
     }
 
@@ -1024,6 +1028,13 @@ protected static boolean isApplicationReady(
                         .filter(s -> !s.isBlank())
                         .collect(Collectors.toList());
         System.out.println("app line " + lineAsList);
+        final String status = lineAsList.get(3);
+        if (status != null && status.equals("ERROR_DEPLOYING")) {
+            log.info("application {} is in ERROR_DEPLOYING state, dumping status", applicationId);
+            executeCommandOnClient(
+                    "bin/langstream apps get %s -o yaml".formatted(applicationId).split(" "));
+            throw new IllegalStateException("application is in ERROR_DEPLOYING state");
+        }
         if (lineAsList.size() <= 5) {
             return false;
         }

langstream-e2e-tests/src/test/java/ai/langstream/tests/WebCrawlerToVectorIT.java

@@ -0,0 +1,99 @@
+/*
+ * Copyright DataStax, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package ai.langstream.tests;
+
+import ai.langstream.tests.util.ConsumeGatewayMessage;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+
+@Slf4j
+@ExtendWith(BaseEndToEndTest.class)
+@Tag(BaseEndToEndTest.CATEGORY_NEEDS_CREDENTIALS)
+public class WebCrawlerToVectorIT extends BaseEndToEndTest {
+
+    static Map<String, String> appEnv;
+
+    @BeforeAll
+    public static void checkCredentials() {
+        appEnv =
+                getAppEnvMapFromSystem(
+                        List.of(
+                                "OPEN_AI_ACCESS_KEY",
+                                "OPEN_AI_URL",
+                                "OPEN_AI_EMBEDDINGS_MODEL",
+                                "OPEN_AI_CHAT_COMPLETIONS_MODEL",
+                                "OPEN_AI_PROVIDER",
+                                "ASTRA_TOKEN",
+                                "ASTRA_CLIENT_ID",
+                                "ASTRA_SECRET",
+                                "ASTRA_SECURE_BUNDLE",
+                                "ASTRA_ENVIRONMENT",
+                                "ASTRA_DATABASE"));
+    }
+
+    @Test
+    public void test() throws Exception {
+        installLangStreamCluster(false);
+        final String tenant = "ten-" + System.currentTimeMillis();
+        setupTenant(tenant);
+
+        final String applicationId = "app";
+
+        deployLocalApplication(applicationId, "webcrawler-to-vector", appEnv);
+        awaitApplicationReady(applicationId, 3);
+
+        final String sessionId = UUID.randomUUID().toString();
+
+        executeCommandOnClient(
+                "bin/langstream gateway produce %s user-input -v 'When was released LangStream 0.0.20? Write it in format yyyy-dd-mm.' -p sessionId=%s"
+                        .formatted(applicationId, sessionId)
+                        .split(" "));
+
+        boolean ok = false;
+        for (int i = 0; i < 10; i++) {
+            final ConsumeGatewayMessage message =
+                    consumeOneMessageFromGateway(
+                            applicationId,
+                            "llm-debug",
+                            "-p sessionId=%s --connect-timeout 30".formatted(sessionId).split(" "));
+            if (message == null) {
+                Thread.sleep(5000);
+                continue;
+            }
+
+            log.info("Output: {}", message);
+            final String asString = (String) message.getRecord().getValue();
+            final String answer = (String) JSON_MAPPER.readValue(asString, Map.class).get("answer");
+            log.info("Answer: {}", answer);
+            if (answer.contains("2023-09-19")) {
+                ok = true;
+                break;
+            }
+            Thread.sleep(5000);
+        }
+        if (!ok) {
+            Assertions.fail(
+                    "the chatbot did not answer correctly, maybe the crawler didn't finished yet?");
+        }
+    }
+}

langstream-e2e-tests/src/test/resources/apps/webcrawler-to-vector/chatbot.yaml

@@ -0,0 +1,90 @@
+#
+# Copyright DataStax, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+topics:
+  - name: "questions-topic"
+    creation-mode: create-if-not-exists
+  - name: "answers-topic"
+    creation-mode: create-if-not-exists
+  - name: "log-topic"
+    creation-mode: create-if-not-exists
+errors:
+    on-failure: "skip"
+resources:
+  size: 2
+pipeline:
+  - name: "convert-to-structure"
+    type: "document-to-json"
+    input: "questions-topic"
+    configuration:
+      text-field: "question"
+  - name: "compute-embeddings"
+    type: "compute-ai-embeddings"
+    configuration:
+      model: "{{{secrets.open-ai.embeddings-model}}}"
+      embeddings-field: "value.question_embeddings"
+      text: "{{% value.question }}"
+      flush-interval: 0
+  - name: "lookup-related-documents-in-llm"
+    type: "query"
+    configuration:
+      datasource: "AstraDatasource"
+      query: "SELECT text FROM langstreamtest.documents ORDER BY embeddings_vector ANN OF ? LIMIT 5"
+      fields:
+        - "value.question_embeddings"
+      output-field: "value.related_documents"
+  - name: "ai-chat-completions"
+    type: "ai-chat-completions"
+
+    configuration:
+      model: "{{{secrets.open-ai.chat-completions-model}}}" # This needs to be set to the model deployment name, not the base name
+      # on the log-topic we add a field with the answer
+      completion-field: "value.answer"
+      # we are also logging the prompt we sent to the LLM
+      log-field: "value.prompt"
+      # here we configure the streaming behavior
+      # as soon as the LLM answers with a chunk we send it to the answers-topic
+      stream-to-topic: "answers-topic"
+      # on the streaming answer we send the answer as whole message
+      # the 'value' syntax is used to refer to the whole value of the message
+      stream-response-completion-field: "value"
+      # we want to stream the answer as soon as we have 20 chunks
+      # in order to reduce latency for the first message the agent sends the first message
+      # with 1 chunk, then with 2 chunks....up to the min-chunks-per-message value
+      # eventually we want to send bigger messages to reduce the overhead of each message on the topic
+      min-chunks-per-message: 20
+      messages:
+        - role: system
+          content: |
+              An user is going to perform a questions, he documents below may help you in answering to their questions.
+              Please try to leverage them in your answer as much as possible.
+              Take into consideration that the user is always asking questions about the LangStream project.
+              If you provide code or YAML snippets, please explicitly state that they are examples.
+              Do not provide information that is not related to the LangStream project.
+            
+              Documents:
+              {{%# value.related_documents}}
+              {{% text}}
+              {{%/ value.related_documents}}
+        - role: user
+          content: "{{% value.question}}"
+  - name: "cleanup-response"
+    type: "drop-fields"
+    output: "log-topic"
+    configuration:
+      fields:
+        - "question_embeddings"
+        - "related_documents"

langstream-e2e-tests/src/test/resources/apps/webcrawler-to-vector/configuration.yaml

@@ -0,0 +1,35 @@
+#
+#
+# Copyright DataStax, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+configuration:
+  resources:
+  - type: "open-ai-configuration"
+    name: "OpenAI Azure configuration"
+    configuration:
+      url: "{{ secrets.open-ai.url }}"
+      access-key: "{{ secrets.open-ai.access-key }}"
+      provider: "{{ secrets.open-ai.provider }}"
+  - type: "datasource"
+    name: "AstraDatasource"
+    configuration:
+      service: "astra"
+      clientId: "{{{ secrets.astra.clientId }}}"
+      secret: "{{{ secrets.astra.secret }}}"
+      secureBundle: "{{{ secrets.astra.secureBundle }}}"
+      database: "{{{ secrets.astra.database }}}"
+      token: "{{{ secrets.astra.token }}}"
+      environment: "{{{ secrets.astra.environment }}}"

langstream-e2e-tests/src/test/resources/apps/webcrawler-to-vector/crawler.yaml

@@ -0,0 +1,96 @@
+#
+# Copyright DataStax, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+name: "Crawl a website"
+topics:
+  - name: "chunks-topic"
+    creation-mode: create-if-not-exists
+resources:
+  size: 2
+pipeline:
+  - name: "Crawl the WebSite"
+    type: "webcrawler-source"
+    configuration:
+      seed-urls: ["https://langstream.ai/changelog/"]
+      allowed-domains: ["https://langstream.ai"]
+      forbidden-paths: []
+      min-time-between-requests: 500
+      reindex-interval-seconds: 3600
+      max-error-count: 5
+      max-urls: 1
+      max-depth: 1
+      handle-robots-file: true
+      user-agent: ""
+      scan-html-documents: true
+      http-timeout: 10000
+      handle-cookies: true
+      max-unflushed-pages: 100
+      bucketName: "langstream-test-crawler-to-vector"
+      endpoint: http://minio.minio-dev.svc.cluster.local:9000
+      access-key: minioadmin
+      secret-key: minioadmin
+  - name: "Extract text"
+    type: "text-extractor"
+  - name: "Normalise text"
+    type: "text-normaliser"
+    configuration:
+      make-lowercase: true
+      trim-spaces: true
+  - name: "Detect language"
+    type: "language-detector"
+    configuration:
+      allowedLanguages: ["en"]
+      property: "language"
+  - name: "Split into chunks"
+    type: "text-splitter"
+    configuration:
+      splitter_type: "RecursiveCharacterTextSplitter"
+      chunk_size: 400
+      separators: ["\n\n", "\n", " ", ""]
+      keep_separator: false
+      chunk_overlap: 100
+      length_function: "cl100k_base"
+  - name: "Convert to structured data"
+    type: "document-to-json"
+    configuration:
+      text-field: text
+      copy-properties: true
+  - name: "prepare-structure"
+    type: "compute"
+    configuration:
+      fields:
+        - name: "value.filename"
+          expression: "properties.url"
+          type: STRING
+        - name: "value.chunk_id"
+          expression: "properties.chunk_id"
+          type: STRING
+        - name: "value.language"
+          expression: "properties.language"
+          type: STRING
+        - name: "value.chunk_num_tokens"
+          expression: "properties.chunk_num_tokens"
+          type: STRING
+  - name: "compute-embeddings"
+    id: "step1"
+    type: "compute-ai-embeddings"
+    output: "chunks-topic"
+    configuration:
+      model: "{{{secrets.open-ai.embeddings-model}}}"
+      embeddings-field: "value.embeddings_vector"
+      text: "{{% value.text }}"
+      batch-size: 10
+      flush-interval: 500