Source Code Cross Referenced for VirtualDatabaseConsole.java in  » Database-JDBC-Connection-Pool » sequoia-2.10.9 » org » continuent » sequoia » console » text » module » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database JDBC Connection Pool » sequoia 2.10.9 » org.continuent.sequoia.console.text.module 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * Sequoia: Database clustering technology.
003:         * Copyright (C) 2002-2004 French National Institute For Research In Computer
004:         * Science And Control (INRIA).
005:         * Copyright (C) 2005 AmicoSoft, Inc. dba Emic Networks
006:         * Contact: sequoia@continuent.org
007:         * 
008:         * Licensed under the Apache License, Version 2.0 (the "License");
009:         * you may not use this file except in compliance with the License.
010:         * You may obtain a copy of the License at
011:         * 
012:         * http://www.apache.org/licenses/LICENSE-2.0
013:         * 
014:         * Unless required by applicable law or agreed to in writing, software
015:         * distributed under the License is distributed on an "AS IS" BASIS,
016:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017:         * See the License for the specific language governing permissions and
018:         * limitations under the License. 
019:         *
020:         * Initial developer(s): Emmanuel Cecchet.
021:         * Contributor(s): Mathieu Peltier, Nicolas Modrzyk.
022:         */package org.continuent.sequoia.console.text.module;
023:
024:        import java.sql.Connection;
025:        import java.sql.DriverManager;
026:        import java.sql.PreparedStatement;
027:        import java.sql.ResultSet;
028:        import java.sql.SQLException;
029:        import java.sql.Savepoint;
030:        import java.util.Hashtable;
031:
032:        import org.continuent.sequoia.common.i18n.ConsoleTranslate;
033:        import org.continuent.sequoia.common.util.Constants;
034:        import org.continuent.sequoia.console.text.Console;
035:        import org.continuent.sequoia.console.text.ConsoleException;
036:        import org.continuent.sequoia.console.text.ConsoleLauncher;
037:        import org.continuent.sequoia.console.text.commands.ConsoleCommand;
038:        import org.continuent.sequoia.console.text.formatter.ResultSetFormatter;
039:
040:        /**
041:         * Sequoia Controller Virtual Database Console module.
042:         * 
043:         * @author <a href="mailto:Emmanuel.Cecchet@inria.fr">Emmanuel Cecchet </a>
044:         * @author <a href="mailto:Mathieu.Peltier@inrialpes.fr">Mathieu Peltier </a>
045:         * @author <a href="mailto:Nicolas.Modrzyk@inrialpes.fr">Nicolas Modrzyk </a>
046:         * @version 1.0
047:         */
048:        public class VirtualDatabaseConsole extends AbstractConsoleModule {
049:            private Connection connection = null;
050:            /**
051:             * contains a hash of <String, SavePoint> to handle savepoints (used by
052:             * SetSavePoint and Rollback commands)
053:             */
054:            private Hashtable savePoints = new Hashtable();
055:
056:            /** Default query timeout. */
057:            private int timeout = 60;
058:
059:            private int fetchsize = 0;
060:
061:            private int maxrows = 0;
062:
063:            private String login;
064:            private String url;
065:
066:            // for backwards compatiblity, multiline statement is disabled by default
067:            private boolean multilineStatementsEnabled = false;
068:            // request delimiter to use when multiline statement is enabled
069:            private String delimiter = DEFAULT_REQUEST_DELIMITER;
070:            private static final String DEFAULT_REQUEST_DELIMITER = ";";
071:            // a buffer used when multiline statement is enabled to keep in
072:            // memory the statement across each handlePrompt()
073:            private StringBuffer currentRequest = new StringBuffer("");
074:
075:            /**
076:             * Creates a new <code>VirtualDatabaseAdmin</code> instance. Loads the
077:             * driver
078:             * 
079:             * @param console console console
080:             */
081:            public VirtualDatabaseConsole(Console console) {
082:                super (console);
083:                try {
084:                    Class.forName(System.getProperty("console.driver",
085:                            "org.continuent.sequoia.driver.Driver"));
086:                } catch (Exception e) {
087:                    console.printError(ConsoleTranslate.get(
088:                            "sql.login.cannot.load.driver",
089:                            ConsoleLauncher.PRODUCT_NAME), e);
090:                    Runtime.getRuntime().exit(1);
091:                }
092:                if (console.isInteractive())
093:                    console.println(ConsoleTranslate.get(
094:                            "sql.login.loaded.driver", new String[] {
095:                                    ConsoleLauncher.PRODUCT_NAME,
096:                                    Constants.VERSION }));
097:            }
098:
099:            /**
100:             * Get the JDBC connection used by the sql console.
101:             * 
102:             * @return a JDBC connection
103:             */
104:            public Connection getConnection() {
105:                return connection;
106:            }
107:
108:            /**
109:             * Create a new connection from the driver.
110:             * 
111:             * @param url the Sequoia url
112:             * @param login the login to use to open the connection
113:             * @param password the password to use to open the connection
114:             * @return a new connection
115:             * @throws ConsoleException if login failed
116:             */
117:            public Connection createConnection(String url, String login,
118:                    String password) throws ConsoleException {
119:                try {
120:                    return DriverManager.getConnection(url, login, password);
121:                } catch (Exception e) {
122:                    throw new ConsoleException(ConsoleTranslate.get(
123:                            "sql.login.connection.failed", new String[] { url,
124:                                    e.getMessage() }));
125:                }
126:            }
127:
128:            /**
129:             * Executes a SQL statement.
130:             * 
131:             * @param request the SQL request to execute
132:             * @param displayResult <code>true</code> if the result must be printed on
133:             *          the standard output
134:             */
135:            public synchronized void execSQL(String request,
136:                    boolean displayResult) {
137:                PreparedStatement stmt = null;
138:                try {
139:                    stmt = connection.prepareStatement(request);
140:                    stmt.setQueryTimeout(timeout);
141:                    if (fetchsize != 0)
142:                        stmt.setFetchSize(fetchsize);
143:                    if (maxrows != 0)
144:                        stmt.setMaxRows(maxrows);
145:
146:                    long start = System.currentTimeMillis();
147:                    long end;
148:                    if (request.toLowerCase().matches("^(\\(|\\s+)*select.*")) {
149:                        ResultSet rs = stmt.executeQuery();
150:                        end = System.currentTimeMillis();
151:                        if (displayResult)
152:                            ResultSetFormatter.display(rs, fetchsize, console);
153:                        rs.close();
154:                    } else {
155:                        boolean hasResult = stmt.execute();
156:                        end = System.currentTimeMillis();
157:
158:                        int updatedRows;
159:                        do {
160:                            updatedRows = -1;
161:                            if (hasResult) {
162:                                ResultSet rs = stmt.getResultSet();
163:                                if (displayResult)
164:                                    ResultSetFormatter.display(rs, fetchsize,
165:                                            console);
166:                                rs.close();
167:                            } else {
168:                                updatedRows = stmt.getUpdateCount();
169:                                if (displayResult)
170:                                    console.printInfo(ConsoleTranslate.get(
171:                                            "sql.display.affected.rows",
172:                                            updatedRows));
173:                            }
174:                            hasResult = stmt.getMoreResults();
175:                            updatedRows = stmt.getUpdateCount();
176:                        } while (hasResult || (updatedRows != -1));
177:                    }
178:                    console.printInfo(ConsoleTranslate.get(
179:                            "sql.display.query.time", new Long[] {
180:                                    new Long((end - start) / 1000),
181:                                    new Long((end - start) % 1000) }));
182:                } catch (Exception e) {
183:                    console.printError(ConsoleTranslate.get(
184:                            "sql.command.sqlquery.error", e), e);
185:                } finally {
186:                    try {
187:                        stmt.close();
188:                    } catch (Exception ignore) {
189:                    }
190:                }
191:            }
192:
193:            /**
194:             * Connects to a virtual database.
195:             */
196:            public void handlePrompt() {
197:                while (!quit) {
198:                    try {
199:                        String cmd = console.readLine(this .getPromptString());
200:                        if (cmd == null) {
201:                            quit();
202:                            break;
203:                        }
204:
205:                        if (cmd.length() == 0)
206:                            continue;
207:
208:                        ConsoleCommand currentCommand = findConsoleCommand(cmd,
209:                                getHashCommands());
210:
211:                        if (currentCommand == null) {
212:                            if (multilineStatementsEnabled) {
213:                                // append a whitespace beacuse console.readLine() trim the cmd
214:                                currentRequest.append(" ").append(cmd);
215:                                if (currentRequest.toString().endsWith(
216:                                        delimiter)) {
217:                                    String request = removeDelimiterAndTrim(currentRequest
218:                                            .toString());
219:                                    execSQL(request, true);
220:                                    currentRequest = new StringBuffer("");
221:                                }
222:                            } else {
223:                                execSQL(cmd, true);
224:                            }
225:                        } else {
226:                            currentCommand.execute(cmd.substring(
227:                                    currentCommand.getCommandName().length())
228:                                    .trim());
229:                        }
230:                    } catch (Exception e) {
231:                        console.printError(ConsoleTranslate.get(
232:                                "sql.display.exception", e), e);
233:                        if ((e instanceof  RuntimeException)
234:                                || (!console.isInteractive() && console
235:                                        .isExitOnError())) {
236:                            System.exit(1);
237:                        }
238:                    }
239:                }
240:            }
241:
242:            /**
243:             * Removes the delimiter at the end of the request and trims the resulting
244:             * substring.
245:             * 
246:             * @param request the SQL request
247:             * @return a String representing the SQL request without its delimiter
248:             * @see #delimiter
249:             */
250:            private String removeDelimiterAndTrim(String request) {
251:                if (request == null) {
252:                    return "";
253:                }
254:                return request.substring(0,
255:                        request.length() - delimiter.length()).trim();
256:            }
257:
258:            /**
259:             * @see org.continuent.sequoia.console.text.module.AbstractConsoleModule#getDescriptionString()
260:             */
261:            public String getDescriptionString() {
262:                return "SQL Console";
263:            }
264:
265:            /**
266:             * @see org.continuent.sequoia.console.text.module.AbstractConsoleModule#getModuleID()
267:             */
268:            protected String getModuleID() {
269:                return "sql"; //$NON-NLS-1$
270:            }
271:
272:            /**
273:             * @see org.continuent.sequoia.console.text.module.AbstractConsoleModule#getPromptString()
274:             */
275:            public String getPromptString() {
276:                int ind1 = url.lastIndexOf('?');
277:                int ind2 = url.lastIndexOf(';');
278:                if (ind1 != -1 || ind2 != -1) {
279:                    String prompt;
280:                    prompt = (ind1 != -1) ? url.substring(0, ind1) : url;
281:                    prompt = (ind2 != -1) ? url.substring(0, ind2) : url;
282:                    return prompt + " (" + login + ")";
283:                } else
284:                    return url + " (" + login + ")";
285:            }
286:
287:            /**
288:             * Get a <code>SavePoint</code> identified by its <code>name</code>
289:             * 
290:             * @param name name fo the <code>SavePoint</code>
291:             * @return a <code>SavePoint</code> or <code>null</code> if no
292:             *         <code>SavePoint</code> with such a name has been previously added
293:             */
294:            public Savepoint getSavePoint(String name) {
295:                return (Savepoint) savePoints.get(name);
296:            }
297:
298:            /**
299:             * add a <code>SavePoint</code>
300:             * 
301:             * @param savePoint the <code>SavePoint</code> to add
302:             * @throws SQLException if the <code>savePoint</code> is unnamed
303:             */
304:            public void addSavePoint(Savepoint savePoint) throws SQLException {
305:                savePoints.put(savePoint.getSavepointName(), savePoint);
306:            }
307:
308:            /**
309:             * Get the timeout value (in seconds)
310:             * 
311:             * @return the timeout value (in seconds)
312:             */
313:            public int getTimeout() {
314:                return timeout;
315:            }
316:
317:            /**
318:             * Set the timeout value (in seconds)
319:             * 
320:             * @param timeout new timeout value (in seconds)
321:             */
322:            public void setTimeout(int timeout) {
323:                this .timeout = timeout;
324:            }
325:
326:            /**
327:             * Get the fetchsize value
328:             * 
329:             * @return the fetchsize value
330:             */
331:            public int getFetchsize() {
332:                return fetchsize;
333:            }
334:
335:            /**
336:             * Set the fetchsize
337:             * 
338:             * @param fetchsize new fetchsize value
339:             */
340:            public void setFetchsize(int fetchsize) {
341:                this .fetchsize = fetchsize;
342:            }
343:
344:            /**
345:             * Set the maxrows
346:             * 
347:             * @param maxrows new maxrows value
348:             */
349:            public void setMaxrows(int maxrows) {
350:                this .maxrows = maxrows;
351:            }
352:
353:            /**
354:             * @see org.continuent.sequoia.console.text.module.AbstractConsoleModule#login(java.lang.String[])
355:             */
356:            public void login(String[] params) throws Exception {
357:                quit = false;
358:
359:                login = null;
360:                url = (params.length > 0 && params[0] != null) ? params[0]
361:                        .trim() : null;
362:                try {
363:                    if ((url == null) || url.trim().equals("")) {
364:                        url = console.readLine(ConsoleTranslate.get(
365:                                "sql.login.prompt.url",
366:                                ConsoleLauncher.PRODUCT_NAME));
367:                        if (url == null)
368:                            return;
369:                    }
370:                    login = console.readLine(ConsoleTranslate
371:                            .get("sql.login.prompt.user"));
372:                    if (login == null)
373:                        return;
374:                    String password = console.readPassword(ConsoleTranslate
375:                            .get("sql.login.prompt.password"));
376:                    if (password == null)
377:                        return;
378:
379:                    connection = createConnection(url, login, password);
380:
381:                    // Change console reader completor
382:                    console.getConsoleReader().removeCompletor(
383:                            console.getControllerModule().getCompletor());
384:                    console.getConsoleReader()
385:                            .addCompletor(this .getCompletor());
386:                } catch (ConsoleException e) {
387:                    throw e;
388:                } catch (Exception e) {
389:                    throw new ConsoleException(ConsoleTranslate.get(
390:                            "sql.login.exception", e));
391:                }
392:            }
393:
394:            /**
395:             * @see org.continuent.sequoia.console.text.module.AbstractConsoleModule#quit()
396:             */
397:            public void quit() {
398:                if (connection != null) {
399:                    try {
400:                        connection.close();
401:                    } catch (Exception e) {
402:                        // ignore
403:                    }
404:                }
405:                super .quit();
406:            }
407:
408:            /**
409:             * @see org.continuent.sequoia.console.text.module.AbstractConsoleModule#help()
410:             */
411:            public void help() {
412:                super .help();
413:                console.println();
414:                console
415:                        .println(ConsoleTranslate
416:                                .get("sql.command.description"));
417:            }
418:
419:            /**
420:             * Sets the request delimiter to use when multiline statement is enabled.
421:             * 
422:             * @param delimiter the String to use as request delimiter
423:             * @see #DEFAULT_REQUEST_DELIMITER
424:             */
425:            public void setRequestDelimiter(String delimiter) {
426:                this .delimiter = delimiter;
427:            }
428:
429:            /**
430:             * Returns the request delimiter
431:             * 
432:             * @return a String representing the request delimiter
433:             */
434:            public String getRequestDelimiter() {
435:                return delimiter;
436:            }
437:
438:            /**
439:             * Enables multiline statements to be able to write one statement on several
440:             * lines. A multiline statement is executed when the user inputs the request
441:             * delimiter String at the end of a line. By default multiline statement is
442:             * disabled (for backwards compatibility)
443:             * 
444:             * @param multilineStatementsEnabled <code>true</code> if multiline
445:             *          statement must be enabled, <code>false</code> else
446:             */
447:            public void enableMultilineStatement(
448:                    boolean multilineStatementsEnabled) {
449:                this.multilineStatementsEnabled = multilineStatementsEnabled;
450:            }
451:        }
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