WIP: This introduce new version and a few changes

pom.xml

@@ -1,3 +1,4 @@
+
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
@@ -46,7 +47,9 @@
         <wildfly.version>35.0.1.Final</wildfly.version>
 
         <!-- LangChain4j -->
-        <langchain4j.version>1.0.0-beta3</langchain4j.version>
+        <langchain4j.version>1.4.0</langchain4j.version>
+        <langchain4j.embedding.all.minilm.version>${langchain4j-document-parser-apache-tika.version}</langchain4j.embedding.all.minilm.version>
+        <langchain4j.mcp.version>${langchain4j-document-parser-apache-tika.version}</langchain4j.mcp.version>
 
         <!-- Logging -->
         <logback.version>1.5.12</logback.version>
@@ -72,6 +75,8 @@
         <surefire-plugin.version>3.5.2</surefire-plugin.version>
         <failsafe-plugin.version>3.5.2</failsafe-plugin.version>
         <dependency-check-plugin.version>9.0.9</dependency-check-plugin.version>
+        <langchain4j-document-parser-apache-tika.version>1.5.0-beta11</langchain4j-document-parser-apache-tika.version>
+        <langchain4j-pgvector.version>1.5.0-beta11</langchain4j-pgvector.version>
     </properties>
 
     <dependencyManagement>
@@ -118,12 +123,17 @@
             <dependency>
                 <groupId>dev.langchain4j</groupId>
                 <artifactId>langchain4j-mcp</artifactId>
-                <version>${langchain4j.version}</version>
+                <version>${langchain4j.mcp.version}</version>
             </dependency>
             <dependency>
                 <groupId>dev.langchain4j</groupId>
                 <artifactId>langchain4j-embeddings-all-minilm-l6-v2</artifactId>
-                <version>${langchain4j.version}</version>
+                <version>${langchain4j.embedding.all.minilm.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>dev.langchain4j</groupId>
+                <artifactId>langchain4j-document-parser-apache-tika</artifactId>
+                <version>${langchain4j-document-parser-apache-tika.version}</version>
             </dependency>
             <dependency>
                 <groupId>dev.langchain4j</groupId>
@@ -188,6 +198,11 @@
                 <version>${rest-assured.version}</version>
                 <scope>test</scope>
             </dependency>
+            <dependency>
+                <groupId>dev.langchain4j</groupId>
+                <artifactId>langchain4j-pgvector</artifactId>
+                <version>${langchain4j-pgvector.version}</version>
+            </dependency>
         </dependencies>
     </dependencyManagement>
 

step-00-chatbot-first-step/src/main/java/learning/jakarta/ai/ConfigurationBean.java

@@ -5,7 +5,6 @@
 import jakarta.inject.Named;
 import lombok.Getter;
 import lombok.Setter;
-import lombok.extern.slf4j.Slf4j;
 
 import java.util.List;
 
@@ -34,7 +33,7 @@ public void init() {
         this.modelName = config.getModelName();
         this.temperature = config.getTemperature();
         this.topP = config.getTopP();
-        this.maxTokens = config.getMaxTokens();
+        this.maxTokens = config.getMaxCompletionToken();
         this.frequencyPenalty = config.getFrequencyPenalty();
         this.logRequests = config.isLogRequests();
         this.logResponses = config.isLogResponses();
@@ -53,7 +52,7 @@ public String updateConfiguration() {
         config.setModelName(modelName);
         config.setTemperature(temperature);
         config.setTopP(topP);
-        config.setMaxTokens(maxTokens);
+        config.setMaxCompletionToken(maxTokens);
         config.setFrequencyPenalty(frequencyPenalty);
         config.setLogRequests(logRequests);
         config.setLogResponses(logResponses);

step-00-chatbot-first-step/src/main/java/learning/jakarta/ai/LangChain4JConfig.java

@@ -43,10 +43,12 @@ public List<String> getAllowedModelsList() {
 
     @Inject
     @ConfigProperty(name = "langchain4j.open-ai.chat-model.max-tokens")
-    private int maxTokens;
+    private int maxCompletionToken;
+
     @Inject
     @ConfigProperty(name = "langchain4j.open-ai.chat-model.frequency-penalty")
     private double frequencyPenalty;
+
     @Inject
     @ConfigProperty(name = "langchain4j.open-ai.chat-model.log-requests")
     private boolean logRequests;

step-00-chatbot-first-step/src/main/java/learning/jakarta/ai/LangChainService.java

@@ -16,37 +16,79 @@ public class LangChainService {
 
     @Inject
     public LangChainService(LangChain4JConfig config) {
-        chatModel = OpenAiChatModel.builder()
-                .apiKey(config.getApiKey())
-                .modelName(config.getModelName())
-                .temperature(config.getTemperature())
-                .topP(config.getTopP())
-                .timeout(config.getTimeout())
-                .maxTokens(config.getMaxTokens())
-                .frequencyPenalty(config.getFrequencyPenalty())
-                .logRequests(config.isLogRequests())
-                .logResponses(config.isLogResponses())
-                .build();
+        chatModel = createModel(config);
     }
 
     public void sendMessage(String message, Consumer<String> consumer) {
         log.info("User message: {}", message);
-        consumer.accept(chatModel.chat(message));
+        try {
+            String response = chatModel.chat(message);
+            if (response != null) {
+                consumer.accept(response);
+            } else {
+                log.error("Received null response from chat model for message: {}", message);
+                consumer.accept("Error: No response from model");
+            }
+        } catch (Exception e) {
+            log.error("Error calling chat model: ", e);
+            consumer.accept("Error: " + e.getMessage());
+        }
     }
 
     public synchronized void updateConfiguration(LangChain4JConfig config) {
         log.info("Updating configuration with new settings : {}", config);
-        chatModel = OpenAiChatModel.builder()
+        chatModel = createModel(config);
+        log.info("Configuration updated successfully");
+    }
+
+    private static OpenAiChatModel createModel(LangChain4JConfig config) {
+        OpenAiChatModel.OpenAiChatModelBuilder builder = OpenAiChatModel.builder()
                 .apiKey(config.getApiKey())
-                .modelName(config.getModelName())
-                .temperature(config.getTemperature())
-                .topP(config.getTopP())
+                .modelName(config.getModelName());
+
+        String model = safeLower(config.getModelName());
+
+        // Controls that some model families don't accept
+        if (supportsTemperature(model)) {
+            builder.temperature(config.getTemperature());
+        }
+        if (supportsFrequencyPenalty(model)) {
+            builder.frequencyPenalty(config.getFrequencyPenalty());
+        }
+        if (supportsTopP(model)) {
+            builder.topP(config.getTopP());
+        }
+
+        return builder
                 .timeout(config.getTimeout())
-                .maxTokens(config.getMaxTokens())
-                .frequencyPenalty(config.getFrequencyPenalty())
+                .maxCompletionTokens(config.getMaxCompletionToken())
                 .logRequests(config.isLogRequests())
                 .logResponses(config.isLogResponses())
                 .build();
-        log.info("Configuration updated successfully");
     }
+
+    private static boolean supportsTemperature(String model) {
+        return !isO1(model) && !isGpt5(model);
+    }
+
+    private static boolean supportsFrequencyPenalty(String model) {
+        return !isO1(model) && !isGpt5(model);
+    }
+
+    private static boolean supportsTopP(String model) {
+        return !isO1(model) ;
+    }
+
+    private static boolean isO1(String model) {
+        return model.startsWith("o1-") || model.equals("o1");
+    }
+
+    private static boolean isGpt5(String model) {
+        return model.startsWith("gpt-5");
+    }
+
+    private static String safeLower(String s) {
+        return s == null ? "" : s.toLowerCase();
+    }
+
 }

step-00-chatbot-first-step/src/main/resources/META-INF/microprofile-config.properties

@@ -2,10 +2,10 @@
 langchain4j.open-ai.api-key=${OPENAI_API_KEY}
 
 # Allowed models list
-langchain4j.open-ai.chat-model.allowed-models=gpt-4,gpt-4o, gpt-4.1, gpt-4.1-mini, gpt-4.1-nano, gpt-4o-mini,o1-preview,o1-mini,gpt-4-turbo,gpt-3.5-turbo,gpt-4.5-preview
+langchain4j.open-ai.chat-model.allowed-models=gpt-5, gpt-5-mini, gpt-5-nano, gpt-4,gpt-4o, gpt-4.1, gpt-4.1-mini, gpt-4.1-nano, gpt-4o-mini,o1-preview,o1-mini,gpt-4-turbo,gpt-3.5-turbo,gpt-4.5-preview
 
 # Default model
-langchain4j.open-ai.chat-model.model-name=gpt-4.1-nano
+langchain4j.open-ai.chat-model.model-name=gpt-5
 langchain4j.open-ai.chat-model.temperature=0.7
 langchain4j.open-ai.chat-model.top-p=1.0
 langchain4j.open-ai.chat-model.timeout=PT60S

step-00-chatbot-first-step/src/main/webapp/chat.xhtml

@@ -276,7 +276,7 @@ Feel free to ask any questions!`;
             </div>
 
             <div class="form-group">
-                <h:outputLabel for="main-maxTokens" value="Max Tokens:"/>
+                <h:outputLabel for="main-maxTokens" value="Max Completion Tokens:"/>
                 <h:inputText id="main-maxTokens" value="#{configurationBean.maxTokens}" 
                            required="true" styleClass="config-input">
                     <f:convertNumber integerOnly="true"/>

step-01-prompts/.claude/settings.local.json

@@ -0,0 +1,9 @@
+{
+  "permissions": {
+    "allow": [
+      "Read(//Users/bazlur/projects/llm-jakarta/step-02-chat-memory/**)"
+    ],
+    "deny": [],
+    "ask": []
+  }
+}

step-01-prompts/pom.xml

@@ -3,70 +3,58 @@
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
-    <groupId>learning.jakarta.ai</groupId>
+    <parent>
+        <groupId>learning.jakarta.ai</groupId>
+        <artifactId>llm-jakarta</artifactId>
+        <version>0.1-SNAPSHOT</version>
+    </parent>
     <artifactId>llm-jakarta-step-01</artifactId>
-    <version>0.1-SNAPSHOT</version>
-    <packaging>war</packaging>
-
     <name>llm-jakarta-step-01</name>
+    <packaging>war</packaging>
     <description>
         This is a very simple Jakarta EE application generated by the official Eclipse Starter.
     </description>
 
+
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <project.report.sourceEncoding>UTF-8</project.report.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <maven.compiler.release>21</maven.compiler.release>
-        <jakartaee-api.version>10.0.0</jakartaee-api.version>
-        <wildfly.version>33.0.2.Final</wildfly.version>
-        <compiler-plugin.version>3.13.0</compiler-plugin.version>
-        <war-plugin.version>3.4.0</war-plugin.version>
-        <wildfly-plugin.version>5.0.1.Final</wildfly-plugin.version>
+        <!-- Rely on parent for dependency and plugin versions -->
     </properties>
 
     <dependencies>
         <dependency>
             <groupId>jakarta.platform</groupId>
             <artifactId>jakarta.jakartaee-api</artifactId>
-            <version>${jakartaee-api.version}</version>
-            <scope>provided</scope>
-        </dependency>
-
-        <dependency>
-            <groupId>jakarta.faces</groupId>
-            <artifactId>jakarta.faces-api</artifactId>
-            <version>4.0.0</version>
             <scope>provided</scope>
         </dependency>
 
         <dependency>
             <groupId>org.eclipse.microprofile.config</groupId>
             <artifactId>microprofile-config-api</artifactId>
-            <version>3.1</version>
+            <scope>provided</scope>
         </dependency>
 
         <dependency>
             <groupId>dev.langchain4j</groupId>
             <artifactId>langchain4j-open-ai</artifactId>
-            <version>0.36.2</version>
         </dependency>
 
         <dependency>
             <groupId>dev.langchain4j</groupId>
             <artifactId>langchain4j</artifactId>
-            <version>0.36.2</version>
         </dependency>
 
-        <!-- Logback Classic -->
+        <!-- Logback for application logging -->
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.5.12</version>
         </dependency>
+
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
-            <version>1.18.36</version>
             <scope>provided</scope>
         </dependency>
     </dependencies>
@@ -77,11 +65,9 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>${compiler-plugin.version}</version>
             </plugin>
             <plugin>
                 <artifactId>maven-war-plugin</artifactId>
-                <version>${war-plugin.version}</version>
                 <configuration>
                     <failOnMissingWebXml>false</failOnMissingWebXml>
                 </configuration>
@@ -91,9 +77,8 @@
             <plugin>
                 <groupId>org.wildfly.plugins</groupId>
                 <artifactId>wildfly-maven-plugin</artifactId>
-                <version>${wildfly-plugin.version}</version>
                 <configuration>
-                    <version>${wildfly.version}</version>
+                    <!-- Inherit WildFly version from parent -->
                     <server-config>standalone.xml</server-config>
                 </configuration>
             </plugin>

step-01-prompts/src/main/java/learning/jakarta/ai/LangChain4JConfig.java

@@ -28,9 +28,17 @@ public class LangChain4JConfig {
     @ConfigProperty(name = "langchain4j.open-ai.chat-model.timeout")
     private Duration timeout;
 
+    @Inject
+    @ConfigProperty(name = "langchain4j.open-ai.chat-model.top-p")
+    private double topP;
+
     @Inject
     @ConfigProperty(name = "langchain4j.open-ai.chat-model.max-tokens")
-    private int maxTokens;
+    private int maxCompletionToken;
+
+    @Inject
+    @ConfigProperty(name = "langchain4j.open-ai.chat-model.allowed-models")
+    private String allowedModels;
     @Inject
     @ConfigProperty(name = "langchain4j.open-ai.chat-model.frequency-penalty")
     private double frequencyPenalty;
@@ -46,5 +54,12 @@ public class LangChain4JConfig {
     @ConfigProperty(name = "langchain4j.personality-type")
     private PersonalityType personalityType;
 
+    public java.util.List<String> getAllowedModelsList() {
+        return java.util.Arrays.asList(allowedModels.split(","))
+                .stream()
+                .map(String::trim)
+                .toList();
+    }
+
 }