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feat: add GET /agents/{id}/metrics endpoint for JVM metrics

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Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
hsiegeln
2026-03-23 18:11:22 +01:00
parent cc433b4215
commit 2051572ee2
5 changed files with 85 additions and 1 deletions
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2
cameleer3-server-app/src/main/java/com/cameleer3/server/app/config/OpenApiConfig.java
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@@ -34,7 +34,7 @@ public class OpenApiConfig {
"ProcessorNode",
"AppCatalogEntry", "RouteSummary", "AgentSummary",
"RouteMetrics", "AgentEventResponse", "AgentInstanceResponse",
"ProcessorMetrics"
"ProcessorMetrics", "AgentMetricsResponse", "MetricBucket"
);
@Bean

65
cameleer3-server-app/src/main/java/com/cameleer3/server/app/controller/AgentMetricsController.java Normal file
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@@ -0,0 +1,65 @@
package com.cameleer3.server.app.controller;
import com.cameleer3.server.app.dto.AgentMetricsResponse;
import com.cameleer3.server.app.dto.MetricBucket;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.web.bind.annotation.*;
import java.time.Instant;
import java.time.temporal.ChronoUnit;
import java.util.*;
@RestController
@RequestMapping("/api/v1/agents/{agentId}/metrics")
public class AgentMetricsController {
private final JdbcTemplate jdbc;
public AgentMetricsController(JdbcTemplate jdbc) {
this.jdbc = jdbc;
}
@GetMapping
public AgentMetricsResponse getMetrics(
@PathVariable String agentId,
@RequestParam String names,
@RequestParam(required = false) Instant from,
@RequestParam(required = false) Instant to,
@RequestParam(defaultValue = "60") int buckets) {
if (from == null) from = Instant.now().minus(1, ChronoUnit.HOURS);
if (to == null) to = Instant.now();
List<String> metricNames = Arrays.asList(names.split(","));
long intervalMs = (to.toEpochMilli() - from.toEpochMilli()) / Math.max(buckets, 1);
String intervalStr = intervalMs + " milliseconds";
Map<String, List<MetricBucket>> result = new LinkedHashMap<>();
for (String name : metricNames) {
result.put(name.trim(), new ArrayList<>());
}
String sql = """
SELECT time_bucket(CAST(? AS interval), collected_at) AS bucket,
metric_name,
AVG(metric_value) AS avg_value
FROM agent_metrics
WHERE agent_id = ?
AND collected_at >= ? AND collected_at < ?
AND metric_name = ANY(?)
GROUP BY bucket, metric_name
ORDER BY bucket
""";
String[] namesArray = metricNames.stream().map(String::trim).toArray(String[]::new);
jdbc.query(sql, rs -> {
String metricName = rs.getString("metric_name");
Instant bucket = rs.getTimestamp("bucket").toInstant();
double value = rs.getDouble("avg_value");
result.computeIfAbsent(metricName, k -> new ArrayList<>())
.add(new MetricBucket(bucket, value));
}, intervalStr, agentId, from, to, namesArray);
return new AgentMetricsResponse(result);
}
}

9
cameleer3-server-app/src/main/java/com/cameleer3/server/app/dto/AgentMetricsResponse.java Normal file
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@@ -0,0 +1,9 @@
package com.cameleer3.server.app.dto;
import java.util.List;
import java.util.Map;
import jakarta.validation.constraints.NotNull;
public record AgentMetricsResponse(
@NotNull Map<String, List<MetricBucket>> metrics
) {}

9
cameleer3-server-app/src/main/java/com/cameleer3/server/app/dto/MetricBucket.java Normal file
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@@ -0,0 +1,9 @@
package com.cameleer3.server.app.dto;
import java.time.Instant;
import jakarta.validation.constraints.NotNull;
public record MetricBucket(
@NotNull Instant time,
double value
) {}

1
cameleer3-server-app/src/main/java/com/cameleer3/server/app/security/SecurityConfig.java
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@@ -80,6 +80,7 @@ public class SecurityConfig {
// Read-only data endpoints — viewer+
.requestMatchers(HttpMethod.GET, "/api/v1/executions/**").hasAnyRole("VIEWER", "OPERATOR", "ADMIN")
.requestMatchers(HttpMethod.GET, "/api/v1/diagrams/**").hasAnyRole("VIEWER", "OPERATOR", "ADMIN")
.requestMatchers(HttpMethod.GET, "/api/v1/agents/*/metrics").hasAnyRole("VIEWER", "OPERATOR", "ADMIN")
.requestMatchers(HttpMethod.GET, "/api/v1/agents").hasAnyRole("VIEWER", "OPERATOR", "ADMIN")
.requestMatchers(HttpMethod.GET, "/api/v1/agents/events-log").hasAnyRole("VIEWER", "OPERATOR", "ADMIN")
.requestMatchers(HttpMethod.GET, "/api/v1/routes/**").hasAnyRole("VIEWER", "OPERATOR", "ADMIN")