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35 changes: 35 additions & 0 deletions
35
langstream-api-gateway/src/main/java/ai/langstream/apigateway/metrics/ApiGatewayMetrics.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| package ai.langstream.apigateway.metrics; | ||
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| import ai.langstream.api.model.Gateway; | ||
| import io.micrometer.core.instrument.Counter; | ||
| import io.micrometer.core.instrument.Metrics; | ||
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| public class ApiGatewayMetrics implements AutoCloseable { | ||
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| private final static String TAG_TENANT = "tenant"; | ||
| private final static String TAG_APPLICATION_ID = "application"; | ||
| private final static String TAG_GATEWAY_ID = "gateway"; | ||
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| public void addHttpGatewayRequest( | ||
| String tenant, | ||
| String applicationId, | ||
| String gatewayId, | ||
| String httpMethod, | ||
| int responseStatusCode) { | ||
| Counter.builder("langstream.gateways.http.requests") | ||
| .description("HTTP requests to gateways") | ||
| .tag(TAG_TENANT, tenant) | ||
| .tag(TAG_APPLICATION_ID, applicationId) | ||
| .tag(TAG_GATEWAY_ID, gatewayId) | ||
| .tag("http_method", httpMethod) | ||
| .tag("response_status_code", responseStatusCode + "") | ||
| .register(Metrics.globalRegistry) | ||
| .increment(); | ||
| } | ||
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| @Override | ||
| public void close() throws Exception { | ||
| Metrics.globalRegistry.close(); | ||
| Metrics.globalRegistry.clear(); | ||
| } | ||
| } |
25 changes: 25 additions & 0 deletions
25
...api-gateway/src/main/java/ai/langstream/apigateway/metrics/ApiGatewayMetricsProvider.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| package ai.langstream.apigateway.metrics; | ||
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| import ai.langstream.api.model.Gateway; | ||
| import ai.langstream.api.runner.topics.TopicProducer; | ||
| import ai.langstream.apigateway.config.TopicProperties; | ||
| import ai.langstream.apigateway.gateways.LRUTopicProducerCache; | ||
| import ai.langstream.apigateway.gateways.TopicProducerCache; | ||
| import io.micrometer.core.instrument.Counter; | ||
| import io.micrometer.core.instrument.Metrics; | ||
| import io.micrometer.core.instrument.binder.cache.GuavaCacheMetrics; | ||
| import org.springframework.context.annotation.Bean; | ||
| import org.springframework.context.annotation.Configuration; | ||
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| import java.util.function.Supplier; | ||
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| @Configuration | ||
| public class ApiGatewayMetricsProvider { | ||
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| @Bean(destroyMethod = "close") | ||
| public ApiGatewayMetrics apiGatewayMetrics() { | ||
| return new ApiGatewayMetrics(); | ||
| } | ||
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| } |
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60 changes: 60 additions & 0 deletions
60
langstream-api-gateway/src/test/java/ai/langstream/apigateway/ApiGatewayTestUtil.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| package ai.langstream.apigateway; | ||
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| import lombok.SneakyThrows; | ||
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| import java.net.URI; | ||
| import java.net.http.HttpClient; | ||
| import java.net.http.HttpRequest; | ||
| import java.net.http.HttpResponse; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.stream.Collectors; | ||
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| import static org.junit.jupiter.api.Assertions.assertEquals; | ||
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| public class ApiGatewayTestUtil { | ||
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| @SneakyThrows | ||
| public static String getPrometheusMetrics(final int port) { | ||
| final String url = | ||
| "http://localhost:%d/management/prometheus" | ||
| .formatted(port); | ||
| final HttpRequest request = | ||
| HttpRequest.newBuilder(URI.create(url)) | ||
| .GET() | ||
| .build(); | ||
| final HttpResponse<String> response = | ||
| HttpClient.newHttpClient().send(request, HttpResponse.BodyHandlers.ofString()); | ||
| assertEquals(200, response.statusCode()); | ||
| return response.body(); | ||
| } | ||
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| public record ParsedMetric(String name, String value, Map<String, String> labels) { | ||
| } | ||
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| public static List<ParsedMetric> findMetric(String metricName, String metrics) { | ||
| return metrics.lines() | ||
| .filter(m -> { | ||
| if (m.startsWith("#")) { | ||
| return false; | ||
| } | ||
| return m.startsWith(metricName + "{"); | ||
| }) | ||
| .map(line -> { | ||
| final String[] parts = line.split(" "); | ||
| String name = parts[0]; | ||
| final String value = parts[1]; | ||
| final String labels = name.substring(name.indexOf("{") + 1, name.indexOf("}")); | ||
| name = name.substring(0, name.indexOf("{")); | ||
| final Map<String, String> labelMap = new HashMap<>(); | ||
| for (String label : labels.split(",")) { | ||
| final String[] labelParts = label.split("="); | ||
| labelMap.put(labelParts[0], labelParts[1].substring(1, labelParts[1].length() - 1)); | ||
| } | ||
| return new ParsedMetric(name, value, labelMap); | ||
| }) | ||
| .collect(Collectors.toList()); | ||
| } | ||
| } |
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