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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.config.server.http.v2;
import java.io.IOException;
import java.io.OutputStream;
import java.util.*;
import com.yahoo.component.annotation.Inject;
import com.yahoo.config.provision.Zone;
import com.yahoo.container.jdisc.HttpRequest;
import com.yahoo.container.jdisc.HttpResponse;
import com.yahoo.path.Path;
import com.yahoo.slime.Cursor;
import com.yahoo.slime.JsonFormat;
import com.yahoo.slime.Slime;
import com.yahoo.vespa.config.ConfigKey;
import com.yahoo.vespa.config.server.RequestHandler;
import com.yahoo.vespa.config.server.http.v2.request.HttpConfigRequests;
import com.yahoo.vespa.config.server.http.v2.request.HttpListConfigsRequest;
import com.yahoo.vespa.config.server.tenant.TenantRepository;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.vespa.config.server.http.HttpConfigResponse;
import com.yahoo.vespa.config.server.http.HttpHandler;
import com.yahoo.vespa.config.server.http.Utils;
import static com.yahoo.jdisc.http.HttpResponse.Status.*;
/**
* Handler for a list configs operation. Lists all configs in model for a given application and tenant.
*
* @author vegardh
* @since 5.3
*/
public class HttpListConfigsHandler extends HttpHandler {
private final TenantRepository tenantRepository;
private final Zone zone;
@Inject
public HttpListConfigsHandler(HttpHandler.Context ctx,
TenantRepository tenantRepository, Zone zone)
{
super(ctx);
this.tenantRepository = tenantRepository;
this.zone = zone;
}
@Override
public HttpResponse handleGET(HttpRequest req) {
HttpListConfigsRequest listReq = HttpListConfigsRequest.createFromListRequest(req);
RequestHandler requestHandler = HttpConfigRequests.getRequestHandler(tenantRepository, listReq);
ApplicationId appId = listReq.getApplicationId();
Set<ConfigKey<?>> configs = requestHandler.listConfigs(appId, Optional.empty(), listReq.isRecursive());
String urlBase = getUrlBase(req, listReq, appId, zone);
Set<ConfigKey<?>> allConfigs = requestHandler.allConfigsProduced(appId, Optional.empty());
return new ListConfigsResponse(configs, allConfigs, urlBase, listReq.isRecursive());
}
static String getUrlBase(HttpRequest req, HttpListConfigsRequest listReq, ApplicationId appId, Zone zone) {
if (listReq.isFullAppId())
return Utils.getUrlBase(req,
Path.fromString("/config/v2/tenant/").
append(appId.tenant().value()).
append("application").
append(appId.application().value()).
append("environment").
append(zone.environment().value()).
append("region").
append(zone.region().value()).
append("instance").
append(appId.instance().value()).getAbsolute()+"/");
else
return Utils.getUrlBase(req,
Path.fromString("/config/v2/tenant/").
append(appId.tenant().value()).
append("application").
append(appId.application().value()).getAbsolute()+"/");
}
static class ListConfigsResponse extends HttpResponse {
private final List<ConfigKey<?>> configs;
private final Set<ConfigKey<?>> allConfigs;
private final String urlBase;
private final boolean recursive;
/**
* New list response
*
* @param configs the configs to include in the list
* @param urlBase for example "http://foo.com:19071/config/v1/ (configs are appended to the listed URLs based on configs list)
* @param recursive list recursively
*/
public ListConfigsResponse(Set<ConfigKey<?>> configs, Set<ConfigKey<?>> allConfigs, String urlBase, boolean recursive) {
super(OK);
this.configs = new ArrayList<>(configs);
Collections.sort(this.configs);
this.allConfigs = allConfigs;
this.urlBase = urlBase;
this.recursive = recursive;
}
/**
* The listing URL for this config in this service
*
* @param key config key
* @param rec recursive
* @return url
*/
public String toUrl(ConfigKey<?> key, boolean rec) {
return urlBase + key.getNamespace() + "." + key.getName() + configIdUrlPart(rec, key.getConfigId());
}
// Do not end with / if it's a recursive listing. Furthermore, don't do it if it's the empty config id (special handling of the root config id).
private String configIdUrlPart(boolean rec, String configId) {
if ("".equals(configId)) return "";
if (rec) return "/" + configId;
return "/" + configId + "/";
}
@Override
public void render(OutputStream outputStream) throws IOException {
Slime slime = new Slime();
Cursor root = slime.setObject();
Cursor array;
if (!recursive) {
array = root.setArray("children");
for (ConfigKey<?> key : keysThatHaveAChildWithSameName(configs, allConfigs)) {
array.addString(toUrl(key, false));
}
}
array = root.setArray("configs");
Collection<ConfigKey<?>> cfs;
if (recursive) {
cfs = configs;
} else {
cfs = withParentConfigId(configs);
}
for (ConfigKey<?> key : cfs) {
array.addString(toUrl(key, true));
}
new JsonFormat(true).encode(outputStream, slime);
}
public static Set<ConfigKey<?>> keysThatHaveAChildWithSameName(Collection<ConfigKey<?>> keys, Set<ConfigKey<?>> allConfigs) {
Set<ConfigKey<?>> ret = new LinkedHashSet<>();
for (ConfigKey<?> k : keys) {
if (ListConfigsResponse.hasAChild(k, allConfigs)) ret.add(k);
}
return ret;
}
// Do we do this already somewhere?
private static Set<ConfigKey<?>> withParentConfigId(Collection<ConfigKey<?>> keys) {
Set<ConfigKey<?>> ret = new LinkedHashSet<>();
for (ConfigKey<?> k : keys) {
ret.add(new ConfigKey<>(k.getName(), parentConfigId(k.getConfigId()), k.getNamespace()));
}
return ret;
}
static String parentConfigId(String id) {
if (id==null) return null;
if (!id.contains("/")) return "";
return id.substring(0, id.lastIndexOf('/'));
}
static boolean hasAChild(ConfigKey<?> key, Set<ConfigKey<?>> keys) {
if ("".equals(key.getConfigId())) return false;
for (ConfigKey<?> k : keys) {
if (!k.getName().equals(key.getName())) continue;
if ("".equals(k.getConfigId())) continue;
if (k.getConfigId().equals(key.getConfigId())) continue;
if (k.getConfigId().startsWith(key.getConfigId())) return true;
}
return false;
}
@Override
public String getContentType() {
return HttpConfigResponse.JSON_CONTENT_TYPE;
}
}
}
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