package com.ctrip.framework.apollo.portal.component;
import com.google.common.collect.Lists;
import com.ctrip.framework.apollo.core.MetaDomainConsts;
import com.ctrip.framework.apollo.core.dto.ServiceDTO;
import com.ctrip.framework.apollo.core.enums.Env;
import com.ctrip.framework.apollo.core.utils.ApolloThreadFactory;
import com.ctrip.framework.apollo.tracer.Tracer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.web.HttpMessageConverters;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;
import org.springframework.web.client.RestTemplate;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import javax.annotation.PostConstruct;
@Component
public class AdminServiceAddressLocator {
private static final int DEFAULT_TIMEOUT_MS = 1000;
private static final long NORMAL_REFRESH_INTERVAL = 5 * 60 * 1000;
private static final long OFFLINE_REFRESH_INTERVAL = 10 * 1000;
private static final int RETRY_TIMES = 3;
private static final String ADMIN_SERVICE_URL_PATH = "/services/admin";
private static final Logger logger = LoggerFactory.getLogger(AdminServiceAddressLocator.class);
private ScheduledExecutorService refreshServiceAddressService;
private RestTemplate restTemplate;
private List<Env> allEnvs;
private Map<Env, List<ServiceDTO>> cache = new ConcurrentHashMap<>();
@Autowired
private HttpMessageConverters httpMessageConverters;
@Autowired
private PortalSettings portalSettings;
@PostConstruct
public void init() {
allEnvs = portalSettings.getAllEnvs();
//init restTemplate
restTemplate = new RestTemplate(httpMessageConverters.getConverters());
if (restTemplate.getRequestFactory() instanceof SimpleClientHttpRequestFactory) {
SimpleClientHttpRequestFactory rf =
(SimpleClientHttpRequestFactory) restTemplate.getRequestFactory();
rf.setReadTimeout(DEFAULT_TIMEOUT_MS);
rf.setConnectTimeout(DEFAULT_TIMEOUT_MS);
} else if (restTemplate.getRequestFactory() instanceof HttpComponentsClientHttpRequestFactory) {
HttpComponentsClientHttpRequestFactory rf =
(HttpComponentsClientHttpRequestFactory) restTemplate.getRequestFactory();
rf.setReadTimeout(DEFAULT_TIMEOUT_MS);
rf.setConnectTimeout(DEFAULT_TIMEOUT_MS);
}
refreshServiceAddressService =
Executors.newScheduledThreadPool(1, ApolloThreadFactory.create("ServiceLocator", false));
refreshServiceAddressService.schedule(new RefreshAdminServerAddressTask(), 1, TimeUnit.MILLISECONDS);
}
public List<ServiceDTO> getServiceList(Env env) {
List<ServiceDTO> services = cache.get(env);
if (CollectionUtils.isEmpty(services)) {
return Collections.emptyList();
}
List<ServiceDTO> randomConfigServices = Lists.newArrayList(services);
Collections.shuffle(randomConfigServices);
return randomConfigServices;
}
//maintain admin server address
private class RefreshAdminServerAddressTask implements Runnable {
@Override
public void run() {
boolean refreshSuccess = true;
//refresh fail if get any env address fail
for (Env env : allEnvs) {
boolean currentEnvRefreshResult = refreshServerAddressCache(env);
refreshSuccess = refreshSuccess && currentEnvRefreshResult;
}
if (refreshSuccess) {
refreshServiceAddressService
.schedule(new RefreshAdminServerAddressTask(), NORMAL_REFRESH_INTERVAL, TimeUnit.MILLISECONDS);
} else {
refreshServiceAddressService
.schedule(new RefreshAdminServerAddressTask(), OFFLINE_REFRESH_INTERVAL, TimeUnit.MILLISECONDS);
}
}
}
private boolean refreshServerAddressCache(Env env) {
for (int i = 0; i < RETRY_TIMES; i++) {
try {
ServiceDTO[] services = getAdminServerAddress(env);
if (services == null || services.length == 0) {
continue;
}
cache.put(env, Arrays.asList(services));
return true;
} catch (Throwable e) {
logger.error(String.format("Get admin server address from meta server failed. env: %s, meta server address:%s",
env, MetaDomainConsts.getDomain(env)), e);
Tracer
.logError(String.format("Get admin server address from meta server failed. env: %s, meta server address:%s",
env, MetaDomainConsts.getDomain(env)), e);
}
}
return false;
}
private ServiceDTO[] getAdminServerAddress(Env env) {
String domainName = MetaDomainConsts.getDomain(env);
String url = domainName + ADMIN_SERVICE_URL_PATH;
return restTemplate.getForObject(url, ServiceDTO[].class);
}
}