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package org.openecomp.policy.drools.healthcheck;
import java.util.ArrayList;
import java.util.Properties;
import javax.ws.rs.core.Response;
import org.openecomp.policy.drools.http.client.HttpClient;
import org.openecomp.policy.drools.http.server.HttpServletServer;
import org.openecomp.policy.drools.persistence.SystemPersistence;
import org.openecomp.policy.drools.properties.Startable;
import org.openecomp.policy.drools.system.PolicyEngine;
public interface HealthCheck extends Startable {
public static class Report {
public String name;
public String url;
public boolean healthy;
public int code;
public String message;
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("Report [name=");
builder.append(name);
builder.append(", url=");
builder.append(url);
builder.append(", healthy=");
builder.append(healthy);
builder.append(", code=");
builder.append(code);
builder.append(", message=");
builder.append(message);
builder.append("]");
return builder.toString();
}
}
public static class Reports {
public boolean healthy;
public ArrayList<Report> details = new ArrayList<>();
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("Reports [healthy=");
builder.append(healthy);
builder.append(", details=");
builder.append(details);
builder.append("]");
return builder.toString();
}
}
public Reports healthCheck();
public static final HealthCheck monitor = new HealthCheckMonitor();
}
class HealthCheckMonitor implements HealthCheck {
protected volatile ArrayList<HttpServletServer> servers = new ArrayList<>();
protected volatile ArrayList<HttpClient> clients = new ArrayList<>();
protected volatile Properties healthCheckProperties = null;
public Reports healthCheck() {
Reports reports = new Reports();
reports.healthy = PolicyEngine.manager.isAlive();
HealthCheck.Report engineReport = new Report();
engineReport.healthy = PolicyEngine.manager.isAlive();
engineReport.name = "PDP-D";
engineReport.url = "self";
engineReport.code = (PolicyEngine.manager.isAlive()) ? 200 : 500;
engineReport.message = (PolicyEngine.manager.isAlive()) ? "alive" : "not alive";
reports.details.add(engineReport);
for (HttpClient client : clients) {
HealthCheck.Report report = new Report();
report.name = client.getName();
report.url = client.getBaseUrl();
report.healthy = true;
try {
Response response = client.get();
report.code = response.getStatus();
if (report.code != 200) {
report.healthy = false;
reports.healthy = false;
}
try {
report.message = HttpClient.getBody(response, String.class);
} catch (Exception e) {
e.printStackTrace();
}
} catch (Exception e) {
report.healthy = false;
reports.healthy = false;
}
reports.details.add(report);
}
return reports;
}
@Override
public boolean start() throws IllegalStateException {
try {
this.healthCheckProperties = SystemPersistence.manager.getProperties(HealthCheckFeature.CONFIGURATION_PROPERTIES_NAME);
this.servers = HttpServletServer.factory.build(healthCheckProperties);
this.clients = HttpClient.factory.build(healthCheckProperties);
for (HttpServletServer server : servers) {
try {
server.start();
} catch (Exception e) {
e.printStackTrace();
}
}
} catch (Exception e) {
return false;
}
return true;
}
@Override
public boolean stop() throws IllegalStateException {
for (HttpServletServer server : servers) {
try {
server.stop();
} catch (Exception e) {
e.printStackTrace();
}
}
for (HttpClient client : clients) {
try {
client.stop();
} catch (Exception e) {
e.printStackTrace();
}
}
return true;
}
@Override
public void shutdown() throws IllegalStateException {
this.stop();
}
@Override
public synchronized boolean isAlive() {
return this.healthCheckProperties != null;
}
public ArrayList<HttpServletServer> getServers() {
return this.servers;
}
public ArrayList<HttpClient> getClients() {
return this.clients;
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("HealthCheckMonitor [servers=");
builder.append(servers);
builder.append(", clients=");
builder.append(clients);
builder.append("]");
return builder.toString();
}
}
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