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NewRelic Alerts Configurator can be used to configure NewRelic alerts for your application. Instead of defining alerts through UI you can define them in code. It allows you to automatize alerts configuration, easily recover them in case of wipe out and have full history of changes in your version control system.

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package com.ocadotechnology.newrelic.apiclient.internal;

import com.ocadotechnology.newrelic.apiclient.AlertsPoliciesApi;
import com.ocadotechnology.newrelic.apiclient.internal.client.NewRelicClient;
import com.ocadotechnology.newrelic.apiclient.internal.model.AlertsPolicyChannelsWrapper;
import com.ocadotechnology.newrelic.apiclient.internal.model.AlertsPolicyList;
import com.ocadotechnology.newrelic.apiclient.internal.model.AlertsPolicyWrapper;
import com.ocadotechnology.newrelic.apiclient.model.policies.AlertsPolicy;
import com.ocadotechnology.newrelic.apiclient.model.policies.AlertsPolicyChannels;

import javax.ws.rs.client.Entity;
import javax.ws.rs.client.Invocation;
import javax.ws.rs.core.MultivaluedHashMap;
import javax.ws.rs.core.MultivaluedMap;
import java.util.Optional;
import java.util.stream.Collectors;

import static javax.ws.rs.core.MediaType.APPLICATION_JSON_TYPE;

class DefaultAlertsPoliciesApi extends ApiBase implements AlertsPoliciesApi {

    private static final String POLICIES_URL = "/v2/alerts_policies.json";
    private static final String POLICY_URL = "/v2/alerts_policies/{policy_id}.json";
    private static final String POLICY_CHANNELS_URL = "/v2/alerts_policy_channels.json";

    DefaultAlertsPoliciesApi(NewRelicClient client) {
        super(client);
    }

    @Override
    public Optional getByName(String alertsPolicyName) {
        Invocation.Builder builder = client
                .target(POLICIES_URL)
                .queryParam("filter[name]", alertsPolicyName)
                .request(APPLICATION_JSON_TYPE);
        return getPageable(builder, AlertsPolicyList.class)
                .filter(alertsPolicy -> alertsPolicy.getName().equals(alertsPolicyName))
                .getSingle();
    }

    @Override
    public AlertsPolicy create(AlertsPolicy policy) {
        return client
                .target(POLICIES_URL)
                .request(APPLICATION_JSON_TYPE)
                .post(Entity.entity(new AlertsPolicyWrapper(policy), APPLICATION_JSON_TYPE), AlertsPolicyWrapper.class)
                .getPolicy();
    }

    @Override
    public AlertsPolicy delete(int policyId) {
        return client
                .target(POLICY_URL)
                .resolveTemplate("policy_id", policyId)
                .request(APPLICATION_JSON_TYPE)
                .delete(AlertsPolicyWrapper.class)
                .getPolicy();
    }

    @Override
    public AlertsPolicyChannels updateChannels(AlertsPolicyChannels channels) {
        MultivaluedMap form = new MultivaluedHashMap<>();
        form.putSingle("policy_id", String.valueOf(channels.getPolicyId()));
        form.putSingle("channel_ids",
                channels.getChannelIds()
                        .stream()
                        .map(String::valueOf)
                        .collect(Collectors.joining(",")));
        return client
                .target(POLICY_CHANNELS_URL)
                .request(APPLICATION_JSON_TYPE)
                .put(Entity.form(form), AlertsPolicyChannelsWrapper.class)
                .getPolicyChannels();
    }
}