mirror of
https://github.com/apache/cloudstack.git
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322 lines
16 KiB
Java
322 lines
16 KiB
Java
/**
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* Copyright (C) 2010 Cloud.com, Inc. All rights reserved.
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*
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* This software is licensed under the GNU General Public License v3 or later.
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*
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* It is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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package com.cloud.api;
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import java.lang.reflect.Field;
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import java.text.DateFormat;
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import java.text.ParseException;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Map;
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import java.util.StringTokenizer;
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import org.apache.log4j.Logger;
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import com.cloud.api.BaseCmd.CommandType;
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import com.cloud.async.AsyncCommandQueued;
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import com.cloud.event.EventVO;
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import com.cloud.exception.AccountLimitException;
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import com.cloud.exception.InsufficientCapacityException;
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import com.cloud.exception.InvalidParameterValueException;
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import com.cloud.exception.PermissionDeniedException;
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import com.cloud.exception.ResourceAllocationException;
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import com.cloud.exception.ResourceUnavailableException;
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import com.cloud.server.ManagementServer;
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import com.cloud.user.Account;
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import com.cloud.user.UserContext;
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import com.cloud.utils.DateUtil;
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import com.cloud.utils.component.ComponentLocator;
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import com.cloud.utils.exception.CloudRuntimeException;
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/**
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* A class that dispatches API commands to the appropriate manager for execution.
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*/
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public class ApiDispatcher {
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private static final Logger s_logger = Logger.getLogger(ApiDispatcher.class.getName());
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ComponentLocator _locator = null;
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// singleton class
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private static ApiDispatcher s_instance = new ApiDispatcher();
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public static ApiDispatcher getInstance() {
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return s_instance;
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}
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private ApiDispatcher() {
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_locator = ComponentLocator.getLocator(ManagementServer.Name);
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}
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public void dispatchCreateCmd(BaseAsyncCreateCmd cmd, Map<String, String> params) {
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boolean created = false;
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String errorMsg = "";
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long startId = 0;
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if(cmd.getCreateEventType() != null){
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startId = cmd.saveStartedEvent(cmd.getCreateEventType(), cmd.getCreateEventDescription(), 0L);
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}
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setupParameters(cmd, params);
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try {
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cmd.create();
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created = true;
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} catch (Throwable t) {
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if (t instanceof InvalidParameterValueException || t instanceof IllegalArgumentException) {
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s_logger.info(t.getMessage());
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errorMsg = "Parameter error";
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throw new ServerApiException(BaseCmd.PARAM_ERROR, t.getMessage());
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} else if (t instanceof PermissionDeniedException) {
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s_logger.info("PermissionDenied: " + t.getMessage());
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errorMsg = "Permission denied";
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throw new ServerApiException(BaseCmd.ACCOUNT_ERROR, t.getMessage());
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} else if (t instanceof AccountLimitException) {
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s_logger.info(t.getMessage());
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errorMsg = "Account resource limit error";
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throw new ServerApiException(BaseCmd.ACCOUNT_RESOURCE_LIMIT_ERROR, t.getMessage());
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}else if (t instanceof InsufficientCapacityException) {
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s_logger.info(t.getMessage());
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errorMsg = "Insufficient capacity";
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throw new ServerApiException(BaseCmd.INSUFFICIENT_CAPACITY_ERROR, t.getMessage());
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} else if (t instanceof ResourceAllocationException) {
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s_logger.info(t.getMessage());
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errorMsg = "Resource allocation error";
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throw new ServerApiException(BaseCmd.RESOURCE_ALLOCATION_ERROR, t.getMessage());
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} else if (t instanceof ResourceUnavailableException) {
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s_logger.warn("Exception: ", t);
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errorMsg = "Resource unavailable error";
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throw new ServerApiException(BaseCmd.RESOURCE_UNAVAILABLE_ERROR, t.getMessage());
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} else if (t instanceof AsyncCommandQueued) {
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throw (AsyncCommandQueued)t;
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} else if (t instanceof ServerApiException) {
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s_logger.warn(t.getClass() + " : " + ((ServerApiException) t).getDescription());
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errorMsg = ((ServerApiException) t).getDescription();
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if (UserContext.current().getCaller().getType() == Account.ACCOUNT_TYPE_ADMIN) {
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throw new ServerApiException(BaseCmd.INTERNAL_ERROR, errorMsg.length() > 0 ? errorMsg : ((ServerApiException) t).getDescription());
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} else {
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throw new ServerApiException(BaseCmd.INTERNAL_ERROR, BaseCmd.USER_ERROR_MESSAGE);
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}
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} else {
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errorMsg = "Internal error";
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s_logger.error("Exception while executing " + cmd.getClass().getSimpleName() + ":", t);
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if (UserContext.current().getCaller().getType() == Account.ACCOUNT_TYPE_ADMIN) {
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throw new ServerApiException(BaseCmd.INTERNAL_ERROR, t.getMessage());
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} else {
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throw new ServerApiException(BaseCmd.INTERNAL_ERROR, BaseCmd.USER_ERROR_MESSAGE);
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}
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}
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} finally {
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if(cmd.getCreateEventType() != null){
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if (created){
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cmd.saveCompletedEvent(EventVO.LEVEL_INFO, cmd.getCreateEventType(), cmd.getCreateEventDescription()+" successfull. Id: "+cmd.getEntityId(), startId);
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} else {
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cmd.saveCompletedEvent(EventVO.LEVEL_ERROR, cmd.getCreateEventType(), cmd.getCreateEventDescription()+" failed. "+errorMsg, startId);
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}
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}
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}
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}
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public void dispatch(BaseCmd cmd, Map<String, String> params) {
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boolean success = false;
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String errorMsg = "";
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setupParameters(cmd, params);
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try {
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if(cmd instanceof BaseAsyncCmd){
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((BaseAsyncCmd)cmd).saveStartedEvent();
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}
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cmd.execute();
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success = true;
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} catch (Throwable t) {
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if (t instanceof InvalidParameterValueException || t instanceof IllegalArgumentException) {
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s_logger.info(t.getMessage());
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errorMsg = "Parameter error";
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throw new ServerApiException(BaseCmd.PARAM_ERROR, t.getMessage());
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} else if (t instanceof PermissionDeniedException) {
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s_logger.info("PermissionDenied: " + t.getMessage());
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errorMsg = "Permission denied";
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throw new ServerApiException(BaseCmd.ACCOUNT_ERROR, t.getMessage());
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} else if (t instanceof AccountLimitException) {
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s_logger.info(t.getMessage());
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errorMsg = "Account resource limit error";
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throw new ServerApiException(BaseCmd.ACCOUNT_RESOURCE_LIMIT_ERROR, t.getMessage());
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} else if (t instanceof InsufficientCapacityException) {
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s_logger.info(t.getMessage());
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errorMsg = "Insufficient capacity";
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throw new ServerApiException(BaseCmd.INSUFFICIENT_CAPACITY_ERROR, t.getMessage());
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} else if (t instanceof ResourceAllocationException) {
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s_logger.warn("Exception: ", t);
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errorMsg = "Resource allocation error";
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throw new ServerApiException(BaseCmd.RESOURCE_ALLOCATION_ERROR, t.getMessage());
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} else if (t instanceof ResourceUnavailableException) {
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s_logger.warn("Exception: ", t);
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errorMsg = "Resource unavailable error";
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throw new ServerApiException(BaseCmd.RESOURCE_UNAVAILABLE_ERROR, t.getMessage());
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} else if (t instanceof AsyncCommandQueued) {
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throw (AsyncCommandQueued)t;
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} else if (t instanceof ServerApiException) {
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errorMsg = ((ServerApiException) t).getDescription();
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s_logger.warn(t.getClass() + " : " + ((ServerApiException) t).getDescription());
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if (UserContext.current().getCaller().getType() == Account.ACCOUNT_TYPE_ADMIN) {
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throw new ServerApiException(BaseCmd.INTERNAL_ERROR, errorMsg);
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} else {
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throw new ServerApiException(BaseCmd.INTERNAL_ERROR, BaseCmd.USER_ERROR_MESSAGE);
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}
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} else {
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errorMsg = "Internal error";
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s_logger.error("Exception while executing " + cmd.getClass().getSimpleName() + ":", t);
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if (UserContext.current().getCaller().getType() == Account.ACCOUNT_TYPE_ADMIN) {
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throw new ServerApiException(BaseCmd.INTERNAL_ERROR, t.getMessage());
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} else {
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throw new ServerApiException(BaseCmd.INTERNAL_ERROR, BaseCmd.USER_ERROR_MESSAGE);
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}
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}
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} finally {
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if(cmd instanceof BaseAsyncCmd){
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BaseAsyncCmd asyncCmd = (BaseAsyncCmd)cmd;
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if(success){
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asyncCmd.saveCompletedEvent(EventVO.LEVEL_INFO, asyncCmd.getEventDescription()+" completed successfully");
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} else {
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asyncCmd.saveCompletedEvent(EventVO.LEVEL_ERROR, asyncCmd.getEventDescription()+" failed. "+errorMsg);
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}
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}
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}
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}
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public static void setupParameters(BaseCmd cmd, Map<String, String> params){
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Map<String, Object> unpackedParams = cmd.unpackParams(params);
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if (cmd instanceof BaseListCmd) {
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if ((unpackedParams.get(ApiConstants.PAGE) == null) && (unpackedParams.get(ApiConstants.PAGE_SIZE) != null)) {
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throw new ServerApiException(BaseCmd.PARAM_ERROR, "\"page\" parameter is required when \"pagesize\" is specified");
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} else if ((unpackedParams.get(ApiConstants.PAGE_SIZE) == null) && (unpackedParams.get(ApiConstants.PAGE) != null)) {
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throw new ServerApiException(BaseCmd.PARAM_ERROR, "\"pagesize\" parameter is required when \"page\" is specified");
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}
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}
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Field[] fields = cmd.getClass().getDeclaredFields();
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Class<?> superClass = cmd.getClass().getSuperclass();
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while (BaseCmd.class.isAssignableFrom(superClass)) {
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Field[] superClassFields = superClass.getDeclaredFields();
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if (superClassFields != null) {
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Field[] tmpFields = new Field[fields.length + superClassFields.length];
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System.arraycopy(fields, 0, tmpFields, 0, fields.length);
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System.arraycopy(superClassFields, 0, tmpFields, fields.length, superClassFields.length);
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fields = tmpFields;
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}
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superClass = superClass.getSuperclass();
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}
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for (Field field : fields) {
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Parameter parameterAnnotation = field.getAnnotation(Parameter.class);
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if ((parameterAnnotation == null) || !parameterAnnotation.expose()) {
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continue;
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}
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Object paramObj = unpackedParams.get(parameterAnnotation.name());
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if (paramObj == null) {
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if (parameterAnnotation.required()) {
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throw new ServerApiException(BaseCmd.PARAM_ERROR, "Unable to execute API command " + cmd.getCommandName() + " due to missing parameter " + parameterAnnotation.name());
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}
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continue;
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}
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// marshall the parameter into the correct type and set the field value
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try {
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setFieldValue(field, cmd, paramObj, parameterAnnotation);
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} catch (IllegalArgumentException argEx) {
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if (s_logger.isDebugEnabled()) {
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s_logger.debug("Unable to execute API command " + cmd.getCommandName() + " due to invalid value " + paramObj + " for parameter " + parameterAnnotation.name());
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}
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throw new ServerApiException(BaseCmd.PARAM_ERROR, "Unable to execute API command " + cmd.getCommandName() + " due to invalid value " + paramObj + " for parameter " + parameterAnnotation.name());
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} catch (ParseException parseEx) {
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if (s_logger.isDebugEnabled()) {
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s_logger.debug("Invalid date parameter " + paramObj + " passed to command " + cmd.getCommandName());
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}
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throw new ServerApiException(BaseCmd.PARAM_ERROR, "Unable to parse date " + paramObj + " for command " + cmd.getCommandName() + ", please pass dates in the format yyyy-MM-dd");
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} catch (CloudRuntimeException cloudEx) {
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// FIXME: Better error message? This only happens if the API command is not executable, which typically means
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// there was
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// and IllegalAccessException setting one of the parameters.
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throw new ServerApiException(BaseCmd.INTERNAL_ERROR, "Internal error executing API command " + cmd.getCommandName());
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}
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}
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}
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@SuppressWarnings({ "unchecked", "rawtypes" })
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private static void setFieldValue(Field field, BaseCmd cmdObj, Object paramObj, Parameter annotation) throws IllegalArgumentException, ParseException {
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try {
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field.setAccessible(true);
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CommandType fieldType = annotation.type();
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switch (fieldType) {
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case BOOLEAN:
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field.set(cmdObj, Boolean.valueOf(paramObj.toString()));
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break;
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case DATE:
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DateFormat format = BaseCmd.INPUT_FORMAT;
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synchronized (format) {
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field.set(cmdObj, format.parse(paramObj.toString()));
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}
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break;
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case FLOAT:
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field.set(cmdObj, Float.valueOf(paramObj.toString()));
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break;
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case INTEGER:
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field.set(cmdObj, Integer.valueOf(paramObj.toString()));
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break;
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case LIST:
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List listParam = new ArrayList();
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StringTokenizer st = new StringTokenizer(paramObj.toString(), ",");
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while (st.hasMoreTokens()) {
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String token = st.nextToken();
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CommandType listType = annotation.collectionType();
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switch (listType) {
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case INTEGER:
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listParam.add(Integer.valueOf(token));
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break;
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case LONG:
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listParam.add(Long.valueOf(token));
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break;
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case STRING:
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listParam.add(token);
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break;
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}
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}
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field.set(cmdObj, listParam);
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break;
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case LONG:
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field.set(cmdObj, Long.valueOf(paramObj.toString()));
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break;
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case STRING:
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field.set(cmdObj, paramObj.toString());
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break;
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case TZDATE:
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field.set(cmdObj, DateUtil.parseTZDateString(paramObj.toString()));
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break;
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case MAP:
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default:
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field.set(cmdObj, paramObj);
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break;
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}
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} catch (IllegalAccessException ex) {
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s_logger.error("Error initializing command " + cmdObj.getCommandName() + ", field " + field.getName() + " is not accessible.");
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throw new CloudRuntimeException("Internal error initializing parameters for command " + cmdObj.getCommandName() + " [field " + field.getName() + " is not accessible]");
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}
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}
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}
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