1 files changed, 75 insertions, 0 deletions
diff --git a/service-monitor/src/main/java/com/yahoo/vespa/service/monitor/internal/health/HealthInfo.java b/service-monitor/src/main/java/com/yahoo/vespa/service/monitor/internal/health/HealthInfo.java
new file mode 100644
index 00000000000..a3fe3cb3106
--- /dev/null
+++ b/service-monitor/src/main/java/com/yahoo/vespa/service/monitor/internal/health/HealthInfo.java
@@ -0,0 +1,75 @@
+// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.vespa.service.monitor.internal.health;
+
+import com.yahoo.vespa.applicationmodel.ServiceStatus;
+import com.yahoo.yolean.Exceptions;
+
+import java.time.Instant;
+import java.util.Optional;
+import java.util.OptionalInt;
+
+/**
+ * The result of a health lookup.
+ *
+ * @author hakon
+ */
+public class HealthInfo {
+    public static final String UP_STATUS_CODE = "up";
+
+    private final Optional<Exception> exception;
+    private final OptionalInt httpStatusCode;
+    private final Optional<String> healthStatusCode;
+    private final Instant time;
+
+    static HealthInfo fromException(Exception exception) {
+        return new HealthInfo(Optional.of(exception), OptionalInt.empty(), Optional.empty());
+    }
+
+    static HealthInfo fromBadHttpStatusCode(int httpStatusCode) {
+        return new HealthInfo(Optional.empty(), OptionalInt.of(httpStatusCode), Optional.empty());
+    }
+
+    static HealthInfo fromHealthStatusCode(String healthStatusCode) {
+        return new HealthInfo(Optional.empty(), OptionalInt.empty(), Optional.of(healthStatusCode));
+    }
+
+    static HealthInfo empty() {
+        return new HealthInfo(Optional.empty(), OptionalInt.empty(), Optional.empty());
+    }
+
+    private HealthInfo(Optional<Exception> exception,
+                       OptionalInt httpStatusCode,
+                       Optional<String> healthStatusCode) {
+        this.exception = exception;
+        this.httpStatusCode = httpStatusCode;
+        this.healthStatusCode = healthStatusCode;
+        this.time = Instant.now();
+    }
+
+    public boolean isHealthy() {
+        return healthStatusCode.map(UP_STATUS_CODE::equals).orElse(false);
+    }
+
+    public ServiceStatus toSerivceStatus() {
+        return isHealthy() ? ServiceStatus.UP : ServiceStatus.DOWN;
+    }
+
+    public Instant time() {
+        return time;
+    }
+
+    @Override
+    public String toString() {
+        if (isHealthy()) {
+            return UP_STATUS_CODE;
+        } else if (healthStatusCode.isPresent()) {
+            return "Bad health status code '" + healthStatusCode.get() + "'";
+        } else if (exception.isPresent()) {
+            return Exceptions.toMessageString(exception.get());
+        } else if (httpStatusCode.isPresent()) {
+            return "Bad HTTP response status code " + httpStatusCode.getAsInt();
+        } else {
+            return "No health info available";
+        }
+    }
+}