Update the alert internal model (#382)

- Updates the fields in the Alert model
- Rips out all code related to the creation and evaluation of alerts in the previous form.

For the latter change in particular, I figured that there wasn't much value in keeping the existing data and view layers around with this change in place since the interface additions would propagate into those layers and I don't intend on supporting them now anyway.

app/com/arpnetworking/metrics/portal/alerts/AlertJob.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2020 Dropbox, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.arpnetworking.metrics.portal.alerts;
+
+import com.arpnetworking.metrics.portal.scheduling.Schedule;
+import com.arpnetworking.metrics.portal.scheduling.impl.NeverSchedule;
+import com.google.inject.Injector;
+import models.internal.alerts.Alert;
+import models.internal.alerts.AlertEvaluationResult;
+import models.internal.scheduling.Job;
+
+import java.time.Duration;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.Optional;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+
+/**
+ * A wrapper around {@code Alert} instances to allow for scheduling and evaluation of Alert queries.
+ *
+ * @author Christian Briones (cbriones at dropbox dot com)
+ */
+public class AlertJob implements Job<AlertEvaluationResult> {
+    private final Alert _alert;
+
+    /**
+     * Create a job from an alert.
+     *
+     * @param alert The alert that this job will evaluate.
+     */
+    public AlertJob(final Alert alert) {
+        this._alert = alert;
+    }
+
+    @Override
+    public UUID getId() {
+        return _alert.getId();
+    }
+
+    @Override
+    public Optional<String> getETag() {
+        return Optional.empty();
+    }
+
+    @Override
+    public Schedule getSchedule() {
+        // TODO(cbriones): If the alert is enabled, this should return an interval corresponding to the smallest query period
+        // in that alert's query.
+        return NeverSchedule.getInstance();
+    }
+
+    @Override
+    public Duration getTimeout() {
+        return Duration.of(1, ChronoUnit.MINUTES);
+    }
+
+    @Override
+    public CompletionStage<? extends AlertEvaluationResult> execute(final Injector injector, final Instant scheduled) {
+        final CompletableFuture<AlertEvaluationResult> future = new CompletableFuture<>();
+        future.completeExceptionally(new UnsupportedOperationException("Alert execution is not implemented"));
+        return future;
+    }
+
+}

app/com/arpnetworking/metrics/portal/alerts/AlertRepository.java

@@ -15,10 +15,10 @@
  */
 package com.arpnetworking.metrics.portal.alerts;
 
-import models.internal.Alert;
 import models.internal.AlertQuery;
 import models.internal.Organization;
 import models.internal.QueryResult;
+import models.internal.alerts.Alert;
 
 import java.util.Optional;
 import java.util.UUID;