com.seyren.api.bean.SubscriptionsBean.java Source code

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Here is the source code for com.seyren.api.bean.SubscriptionsBean.java

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/**
 * 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.seyren.api.bean;

import com.google.common.base.Predicate;
import com.google.common.collect.Collections2;
import com.seyren.api.jaxrs.SubscriptionsResource;
import com.seyren.core.domain.*;
import com.seyren.core.service.notification.NotificationService;
import com.seyren.core.store.ChecksStore;
import com.seyren.core.store.PermissionsStore;
import com.seyren.core.store.SubscriptionsStore;
import com.seyren.core.util.config.SeyrenConfig;
import org.joda.time.DateTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.security.core.context.SecurityContextHolder;

import javax.inject.Inject;
import javax.inject.Named;
import javax.ws.rs.PathParam;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import java.math.BigDecimal;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

@Named
public class SubscriptionsBean implements SubscriptionsResource {
    private static final Logger LOGGER = LoggerFactory.getLogger(SubscriptionsBean.class);

    private ChecksStore checksStore;
    private SubscriptionsStore subscriptionsStore;
    private final Iterable<NotificationService> notificationServices;
    private final PermissionsStore permissionsStore;
    private final SeyrenConfig seyrenConfig;

    @Inject
    public SubscriptionsBean(ChecksStore checksStore, SubscriptionsStore subscriptionsStore,
            List<NotificationService> notificationServices, PermissionsStore permissionsStore,
            SeyrenConfig seyrenConfig) {
        this.checksStore = checksStore;
        this.subscriptionsStore = subscriptionsStore;
        this.notificationServices = notificationServices;
        this.permissionsStore = permissionsStore;
        this.seyrenConfig = seyrenConfig;
    }

    @Override
    public Response createSubscription(String checkId, Subscription subscription) {
        if (hasNotificationPermissions(subscription.getType())) {
            Subscription stored = subscriptionsStore.createSubscription(checkId, subscription);
            return Response.created(uri(checkId, stored.getId())).build();
        }
        return Response.status(Response.Status.FORBIDDEN).build();
    }

    @Override
    public Response updateSubscription(String checkId, Subscription subscription) {
        if (hasNotificationPermissions(subscription.getType())) {
            subscriptionsStore.updateSubscription(checkId, subscription);
            return Response.noContent().build();
        }
        return Response.status(Response.Status.FORBIDDEN).build();
    }

    @Override
    public Response deleteSubscription(String checkId, String subscriptionId) {
        subscriptionsStore.deleteSubscription(checkId, subscriptionId);
        return Response.noContent().build();
    }

    @Override
    public Response testSubscription(@PathParam("checkId") String checkId,
            @PathParam("subscriptionId") final String subscriptionId) {
        Check check = checksStore.getCheck(checkId);
        if (check == null) {
            return Response.status(Response.Status.NOT_FOUND).build();
        }
        Collection<Subscription> subscriptions = Collections2.filter(check.getSubscriptions(),
                new Predicate<Subscription>() {
                    @Override
                    public boolean apply(Subscription subscription) {
                        return subscription.getId().equals(subscriptionId);
                    }
                });
        if (subscriptions.size() != 1) {
            return Response.status(Response.Status.NOT_FOUND).build();
        }
        check.setState(AlertType.ERROR);
        Subscription subscription = subscriptions.iterator().next();
        List<Alert> interestingAlerts = new ArrayList<Alert>();
        Alert alert = new Alert().withTarget(check.getTarget()).withValue(BigDecimal.valueOf(0.0))
                .withWarn(check.getWarn()).withError(check.getError()).withFromType(AlertType.OK)
                .withToType(AlertType.ERROR).withTimestamp(new DateTime());
        interestingAlerts.add(alert);
        for (NotificationService notificationService : notificationServices) {
            if (notificationService.canHandle(subscription.getType())) {
                try {
                    notificationService.sendNotification(check, subscription, interestingAlerts);
                } catch (Exception e) {
                    LOGGER.warn("Notifying {} by {} failed.", subscription.getTarget(), subscription.getType(), e);
                    return Response.status(Response.Status.INTERNAL_SERVER_ERROR)
                            .entity(String.format("Notifying failed '%s'", e.getMessage()))
                            .type(MediaType.TEXT_PLAIN).build();
                }
            }
        }
        return Response.noContent().build();
    }

    private URI uri(String checkId, String subscriptionId) {
        try {
            return new URI("checks/" + checkId + "/subscriptions/" + subscriptionId);
        } catch (URISyntaxException e) {
            throw new RuntimeException(e);
        }
    }

    private Boolean hasNotificationPermissions(SubscriptionType type) {
        if (!seyrenConfig.isSecurityEnabled()) {
            return true;
        }

        String username = SecurityContextHolder.getContext().getAuthentication().getName();
        SubscriptionPermissions permissions = permissionsStore.getPermissions(username);
        SubscriptionPermissions globalPermissions = permissionsStore.getPermissions("global");
        for (String s : permissions.getWrite()) {
            if (type.name().equals(s)) {
                return true;
            }
        }
        for (String s : globalPermissions.getWrite()) {
            if (type.name().equals(s)) {
                return true;
            }
        }
        return false;
    }
}