Make allow negative keep alive value with OllamaEmbeddingModel

Signed-off-by: jonghoon park <[email protected]>

Author: dev-jonghoonpark

Diff for: models/spring-ai-ollama/src/main/java/org/springframework/ai/ollama/OllamaEmbeddingModel.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2023-2024 the original author or authors.
+ * Copyright 2023-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -60,6 +60,7 @@
  * @author Christian Tzolov
  * @author Thomas Vitale
  * @author Ilayaperumal Gopinathan
+ * @author Jonghoon Park
  * @since 0.8.0
  */
 public class OllamaEmbeddingModel extends AbstractEmbeddingModel {
@@ -188,7 +189,7 @@ public void setObservationConvention(EmbeddingModelObservationConvention observa
 
 	public static class DurationParser {
 
-		private static final Pattern PATTERN = Pattern.compile("(\\d+)(ms|s|m|h)");
+		private static final Pattern PATTERN = Pattern.compile("(-?\\d+)(ms|s|m|h)");
 
 		public static Duration parse(String input) {
 

Diff for: models/spring-ai-ollama/src/test/java/org/springframework/ai/ollama/OllamaEmbeddingRequestTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2023-2024 the original author or authors.
+ * Copyright 2023-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@
 
 package org.springframework.ai.ollama;
 
+import java.time.Duration;
 import java.util.List;
 
 import org.junit.jupiter.api.Test;
@@ -28,6 +29,7 @@
 /**
  * @author Christian Tzolov
  * @author Thomas Vitale
+ * @author Jonghoon Park
  */
 public class OllamaEmbeddingRequestTests {
 
@@ -67,4 +69,14 @@ public void ollamaEmbeddingRequestRequestOptions() {
 		assertThat(request.input()).isEqualTo(List.of("Hello"));
 	}
 
+	@Test
+	public void ollamaEmbeddingRequestWithNegativeKeepAlive() {
+
+		var promptOptions = OllamaOptions.builder().model("PROMPT_MODEL").keepAlive("-1m").build();
+
+		var request = this.embeddingModel.ollamaEmbeddingRequest(List.of("Hello"), promptOptions);
+
+		assertThat(request.keepAlive()).isEqualTo(Duration.ofMinutes(-1));
+	}
+
 }