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// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 org.apache.cloudstack.discovery;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.ejb.Local;
import javax.inject.Inject;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Component;
import com.google.gson.annotations.SerializedName;
import org.apache.cloudstack.acl.APIChecker;
import org.apache.cloudstack.api.APICommand;
import org.apache.cloudstack.api.BaseAsyncCmd;
import org.apache.cloudstack.api.BaseAsyncCreateCmd;
import org.apache.cloudstack.api.BaseCmd;
import org.apache.cloudstack.api.BaseResponse;
import org.apache.cloudstack.api.Parameter;
import org.apache.cloudstack.api.command.user.discovery.ListApisCmd;
import org.apache.cloudstack.api.response.ApiDiscoveryResponse;
import org.apache.cloudstack.api.response.ApiParameterResponse;
import org.apache.cloudstack.api.response.ApiResponseResponse;
import org.apache.cloudstack.api.response.ListResponse;
import com.cloud.serializer.Param;
import com.cloud.user.User;
import com.cloud.utils.ReflectUtil;
import com.cloud.utils.StringUtils;
import com.cloud.utils.component.ComponentLifecycleBase;
import com.cloud.utils.component.PluggableService;
@Component
@Local(value = ApiDiscoveryService.class)
public class ApiDiscoveryServiceImpl extends ComponentLifecycleBase implements ApiDiscoveryService {
private static final Logger s_logger = Logger.getLogger(ApiDiscoveryServiceImpl.class);
List<APIChecker> _apiAccessCheckers = null;
List<PluggableService> _services = null;
private static Map<String, ApiDiscoveryResponse> s_apiNameDiscoveryResponseMap = null;
protected ApiDiscoveryServiceImpl() {
super();
}
@Override
public boolean start() {
if (s_apiNameDiscoveryResponseMap == null) {
long startTime = System.nanoTime();
s_apiNameDiscoveryResponseMap = new HashMap<String, ApiDiscoveryResponse>();
Set<Class<?>> cmdClasses = new HashSet<Class<?>>();
for (PluggableService service : _services) {
s_logger.debug(String.format("getting api commands of service: %s", service.getClass().getName()));
cmdClasses.addAll(service.getCommands());
}
cmdClasses.addAll(this.getCommands());
cacheResponseMap(cmdClasses);
long endTime = System.nanoTime();
s_logger.info("Api Discovery Service: Annotation, docstrings, api relation graph processed in " + (endTime - startTime) / 1000000.0 + " ms");
}
return true;
}
protected Map<String, List<String>> cacheResponseMap(Set<Class<?>> cmdClasses) {
Map<String, List<String>> responseApiNameListMap = new HashMap<String, List<String>>();
for (Class<?> cmdClass : cmdClasses) {
APICommand apiCmdAnnotation = cmdClass.getAnnotation(APICommand.class);
if (apiCmdAnnotation == null) {
apiCmdAnnotation = cmdClass.getSuperclass().getAnnotation(APICommand.class);
}
if (apiCmdAnnotation == null || !apiCmdAnnotation.includeInApiDoc() || apiCmdAnnotation.name().isEmpty()) {
continue;
}
String apiName = apiCmdAnnotation.name();
if (s_logger.isTraceEnabled()) {
s_logger.trace("Found api: " + apiName);
}
ApiDiscoveryResponse response = getCmdRequestMap(cmdClass, apiCmdAnnotation);
String responseName = apiCmdAnnotation.responseObject().getName();
if (!responseName.contains("SuccessResponse")) {
if (!responseApiNameListMap.containsKey(responseName)) {
responseApiNameListMap.put(responseName, new ArrayList<String>());
}
responseApiNameListMap.get(responseName).add(apiName);
}
response.setRelated(responseName);
Field[] responseFields = apiCmdAnnotation.responseObject().getDeclaredFields();
for (Field responseField : responseFields) {
ApiResponseResponse responseResponse = getFieldResponseMap(responseField);
response.addApiResponse(responseResponse);
}
response.setObjectName("api");
s_apiNameDiscoveryResponseMap.put(apiName, response);
}
for (String apiName : s_apiNameDiscoveryResponseMap.keySet()) {
ApiDiscoveryResponse response = s_apiNameDiscoveryResponseMap.get(apiName);
Set<ApiParameterResponse> processedParams = new HashSet<ApiParameterResponse>();
for (ApiParameterResponse param : response.getParams()) {
if (responseApiNameListMap.containsKey(param.getRelated())) {
List<String> relatedApis = responseApiNameListMap.get(param.getRelated());
param.setRelated(StringUtils.join(relatedApis, ","));
} else {
param.setRelated(null);
}
processedParams.add(param);
}
response.setParams(processedParams);
if (responseApiNameListMap.containsKey(response.getRelated())) {
List<String> relatedApis = responseApiNameListMap.get(response.getRelated());
relatedApis.remove(apiName);
response.setRelated(StringUtils.join(relatedApis, ","));
} else {
response.setRelated(null);
}
s_apiNameDiscoveryResponseMap.put(apiName, response);
}
return responseApiNameListMap;
}
private ApiResponseResponse getFieldResponseMap(Field responseField) {
ApiResponseResponse responseResponse = new ApiResponseResponse();
SerializedName serializedName = responseField.getAnnotation(SerializedName.class);
Param param = responseField.getAnnotation(Param.class);
if (serializedName != null && param != null) {
responseResponse.setName(serializedName.value());
responseResponse.setDescription(param.description());
responseResponse.setType(responseField.getType().getSimpleName().toLowerCase());
//If response is not of primitive type - we have a nested entity
Class fieldClass = param.responseObject();
if (fieldClass != null) {
Class<?> superClass = fieldClass.getSuperclass();
if (superClass != null) {
String superName = superClass.getName();
if (superName.equals(BaseResponse.class.getName())) {
Field[] fields = fieldClass.getDeclaredFields();
for (Field field : fields) {
ApiResponseResponse innerResponse = getFieldResponseMap(field);
if (innerResponse != null) {
responseResponse.addApiResponse(innerResponse);
}
}
}
}
}
}
return responseResponse;
}
private ApiDiscoveryResponse getCmdRequestMap(Class<?> cmdClass, APICommand apiCmdAnnotation) {
String apiName = apiCmdAnnotation.name();
ApiDiscoveryResponse response = new ApiDiscoveryResponse();
response.setName(apiName);
response.setDescription(apiCmdAnnotation.description());
if (!apiCmdAnnotation.since().isEmpty()) {
response.setSince(apiCmdAnnotation.since());
}
Set<Field> fields = ReflectUtil.getAllFieldsForClass(cmdClass, new Class<?>[] {BaseCmd.class, BaseAsyncCmd.class, BaseAsyncCreateCmd.class});
boolean isAsync = ReflectUtil.isCmdClassAsync(cmdClass, new Class<?>[] {BaseAsyncCmd.class, BaseAsyncCreateCmd.class});
response.setAsync(isAsync);
for (Field field : fields) {
Parameter parameterAnnotation = field.getAnnotation(Parameter.class);
if (parameterAnnotation != null && parameterAnnotation.expose() && parameterAnnotation.includeInApiDoc()) {
ApiParameterResponse paramResponse = new ApiParameterResponse();
paramResponse.setName(parameterAnnotation.name());
paramResponse.setDescription(parameterAnnotation.description());
paramResponse.setType(parameterAnnotation.type().toString().toLowerCase());
paramResponse.setLength(parameterAnnotation.length());
paramResponse.setRequired(parameterAnnotation.required());
if (!parameterAnnotation.since().isEmpty()) {
paramResponse.setSince(parameterAnnotation.since());
}
paramResponse.setRelated(parameterAnnotation.entityType()[0].getName());
response.addParam(paramResponse);
}
}
return response;
}
@Override
public ListResponse<? extends BaseResponse> listApis(User user, String name) {
ListResponse<ApiDiscoveryResponse> response = new ListResponse<ApiDiscoveryResponse>();
List<ApiDiscoveryResponse> responseList = new ArrayList<ApiDiscoveryResponse>();
if (user == null)
return null;
if (name != null) {
if (!s_apiNameDiscoveryResponseMap.containsKey(name))
return null;
for (APIChecker apiChecker : _apiAccessCheckers) {
try {
apiChecker.checkAccess(user, name);
} catch (Exception ex) {
s_logger.debug("API discovery access check failed for " + name + " with " + ex.getMessage());
return null;
}
}
responseList.add(s_apiNameDiscoveryResponseMap.get(name));
} else {
for (String apiName : s_apiNameDiscoveryResponseMap.keySet()) {
boolean isAllowed = true;
for (APIChecker apiChecker : _apiAccessCheckers) {
try {
apiChecker.checkAccess(user, apiName);
} catch (Exception ex) {
isAllowed = false;
}
}
if (isAllowed)
responseList.add(s_apiNameDiscoveryResponseMap.get(apiName));
}
}
response.setResponses(responseList);
return response;
}
@Override
public List<Class<?>> getCommands() {
List<Class<?>> cmdList = new ArrayList<Class<?>>();
cmdList.add(ListApisCmd.class);
return cmdList;
}
public List<APIChecker> getApiAccessCheckers() {
return _apiAccessCheckers;
}
public void setApiAccessCheckers(List<APIChecker> apiAccessCheckers) {
this._apiAccessCheckers = apiAccessCheckers;
}
public List<PluggableService> getServices() {
return _services;
}
@Inject
public void setServices(List<PluggableService> services) {
this._services = services;
}
}