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MDW is a microservices based workflow framework
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/*
 * Copyright (C) 2017 CenturyLink, 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.centurylink.mdw.monitor;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

import com.centurylink.mdw.common.service.RegisteredService;
import com.centurylink.mdw.common.service.ServiceRegistry;
import com.centurylink.mdw.model.workflow.RuntimeContext;

/**
 * Registry for MDW monitoring services.
 */
public class MonitorRegistry extends ServiceRegistry {

    public static final List monitorServices = new ArrayList(Arrays.asList(new String[] {ProcessMonitor.class.getName(), ActivityMonitor.class.getName(),
            AdapterMonitor.class.getName(), ServiceMonitor.class.getName()}));

    protected MonitorRegistry(List> serviceInterfaces) {
        super(serviceInterfaces);
    }

    private static MonitorRegistry instance;
    public static MonitorRegistry getInstance() {
        if (instance == null) {
            List> services = new ArrayList>();
            services.add(ProcessMonitor.class);
            services.add(ActivityMonitor.class);
            services.add(AdapterMonitor.class);
            services.add(ServiceMonitor.class);
            instance = new MonitorRegistry(services);
        }
        return instance;
    }

    /**
     * Returns all process monitors.
     */
    public List getProcessMonitors() {
        return getDynamicServices(ProcessMonitor.class);
    }
    /**
     * Returns only enabled monitors.
     */
    public List getProcessMonitors(RuntimeContext context) {
        return getProcessMonitors().stream().filter(monitor ->
            monitor.isEnabled(context)
        ).collect(Collectors.toList());
    }

    /**
     * Returns all activity monitors.
     */
    public List getActivityMonitors() {
        return getDynamicServices(ActivityMonitor.class);
    }
    /**
     * Returns only enabled monitors.
     */
    public List getActivityMonitors(RuntimeContext context) {
        return getActivityMonitors().stream().filter(monitor ->
            monitor.isEnabled(context)
        ).collect(Collectors.toList());
    }

    /**
     * Returns all adapter monitors.
     */
    public List getAdapterMonitors() {
        return getDynamicServices(AdapterMonitor.class);
    }
    /**
     * Returns only enabled monitors.
     */
    public List getAdapterMonitors(RuntimeContext context) {
        return getAdapterMonitors().stream().filter(monitor ->
            monitor.isEnabled(context)
        ).collect(Collectors.toList());
    }

    /**
     * Returns all task monitors.
     */
    public List getTaskMonitors() {
        return getDynamicServices(TaskMonitor.class);
    }
    /**
     * Returns only enabled monitors.
     */
    public List getTaskMonitors(RuntimeContext context) {
        return getTaskMonitors().stream().filter(monitor ->
            monitor.isEnabled(context)
        ).collect(Collectors.toList());
    }

    /**
     * Returns all service monitors.
     */
    public List getServiceMonitors() {
        List serviceMonitors = new ArrayList<>();
        serviceMonitors.addAll(getDynamicServices(ServiceMonitor.class));
        return serviceMonitors;
    }
}