Source Code Cross Referenced for MySQLDataStoreFactory.java in  » GIS » GeoTools-2.4.1 » org » geotools » data » mysql » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » GIS » GeoTools 2.4.1 » org.geotools.data.mysql 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *    GeoTools - OpenSource mapping toolkit
003:         *    http://geotools.org
004:         *    (C) 2002-2006, GeoTools Project Managment Committee (PMC)
005:         * 
006:         *    This library is free software; you can redistribute it and/or
007:         *    modify it under the terms of the GNU Lesser General Public
008:         *    License as published by the Free Software Foundation;
009:         *    version 2.1 of the License.
010:         *
011:         *    This library is distributed in the hope that it will be useful,
012:         *    but WITHOUT ANY WARRANTY; without even the implied warranty of
013:         *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014:         *    Lesser General Public License for more details.
015:         */
016:        package org.geotools.data.mysql;
017:
018:        import java.io.IOException;
019:        import java.util.Collections;
020:        import java.util.Map;
021:        import java.util.logging.Logger;
022:
023:        import javax.sql.DataSource;
024:
025:        import org.geotools.data.AbstractDataStoreFactory;
026:        import org.geotools.data.DataSourceException;
027:        import org.geotools.data.DataStore;
028:        import org.geotools.data.jdbc.datasource.DataSourceUtil;
029:        import org.geotools.data.jdbc.datasource.ManageableDataSource;
030:
031:        /**
032:         * Creates a MySQLDataStoreFactory based on the correct params.
033:         * 
034:         * <p>
035:         * This factory should be registered in the META-INF/ folder, under services/
036:         * in the DataStoreFactorySpi file.
037:         * </p>
038:         *
039:         * @author Andrea Aime, University of Modena and Reggio Emilia
040:         * @source $URL: http://svn.geotools.org/geotools/tags/2.4.1/modules/unsupported/mysql/src/main/java/org/geotools/data/mysql/MySQLDataStoreFactory.java $
041:         */
042:        public class MySQLDataStoreFactory extends AbstractDataStoreFactory {
043:
044:            private static final Logger LOGGER = org.geotools.util.logging.Logging
045:                    .getLogger(MySQLDataStoreFactory.class.getName());
046:
047:            /** Creates MySQL JDBC driver class. */
048:            private static final String DRIVER_CLASS = "com.mysql.jdbc.Driver";
049:
050:            /** Param, package visibiity for JUnit tests */
051:            static final Param DBTYPE = new Param("dbtype", String.class,
052:                    "must be 'mysql'", true, "mysql");
053:
054:            /** Param, package visibiity for JUnit tests */
055:            static final Param HOST = new Param("host", String.class,
056:                    "mysql host machine", true, "localhost");
057:
058:            /** Param, package visibiity for JUnit tests */
059:            static final Param PORT = new Param("port", Integer.class,
060:                    "mysql connection port", false, "3306");
061:
062:            /** Param, package visibiity for JUnit tests */
063:            static final Param DATABASE = new Param("database", String.class,
064:                    "msyql database");
065:
066:            /** Param, package visibiity for JUnit tests */
067:            static final Param USER = new Param("user", String.class,
068:                    "user name to login as", false);
069:
070:            /** Param, package visibiity for JUnit tests */
071:            static final Param PASSWD = new Param("passwd", String.class,
072:                    "password used to login", false);
073:
074:            static final Param MAXCONN = new Param("max connections",
075:                    Integer.class, "maximum number of open connections", false,
076:                    new Integer(10));
077:
078:            static final Param MINCONN = new Param("min connections",
079:                    Integer.class, "minimum number of pooled connection",
080:                    false, new Integer(4));
081:
082:            static final Param VALIDATECONN = new Param("validate connections",
083:                    Boolean.class, "check connection is alive before using it",
084:                    false, Boolean.FALSE);
085:
086:            /** Param, package visibiity for JUnit tests */
087:            static final Param NAMESPACE = new Param("namespace", String.class,
088:                    "namespace prefix used", false);
089:
090:            public static final Param WKBENABLED = new Param("wkb enabled",
091:                    Boolean.class,
092:                    "set to true if Well Known Binary should be used to read PostGIS "
093:                            + "data (experimental)", false, new Boolean(true));
094:
095:            /** Array with all of the params */
096:            static final Param[] arrayParameters = { DBTYPE, HOST, PORT,
097:                    DATABASE, USER, PASSWD, NAMESPACE, WKBENABLED };
098:
099:            /**
100:             * Creates a new instance of PostgisDataStoreFactory
101:             */
102:            public MySQLDataStoreFactory() {
103:            }
104:
105:            /**
106:             * Checks to see if all the postgis params are there.
107:             * 
108:             * <p>
109:             * Should have:
110:             * </p>
111:             * 
112:             * <ul>
113:             * <li>
114:             * dbtype: equal to postgis
115:             * </li>
116:             * <li>
117:             * host
118:             * </li>
119:             * <li>
120:             * user
121:             * </li>
122:             * <li>
123:             * passwd
124:             * </li>
125:             * <li>
126:             * database
127:             * </li>
128:             * </ul>
129:             * 
130:             *
131:             * @param params Set of parameters needed for a postgis data store.
132:             *
133:             * @return <code>true</code> if dbtype equals postgis, and contains keys
134:             *         for host, user, passwd, and database.
135:             */
136:            public boolean canProcess(Map params) {
137:                if (!super .canProcess(params))
138:                    return false;
139:
140:                return ((String) params.get("dbtype"))
141:                        .equalsIgnoreCase("mysql");
142:            }
143:
144:            /**
145:             * Construct a postgis data store using the params.
146:             *
147:             * @param params The full set of information needed to construct a live
148:             *        data source.  Should have  dbtype equal to postgis, as well as
149:             *        host, user, passwd, database, and table.
150:             *
151:             * @return The created DataSource, this may be null if the required
152:             *         resource was not found or if insufficent parameters were given.
153:             *         Note that canProcess() should have returned false if the
154:             *         problem is to do with insuficent parameters.
155:             *
156:             * @throws IOException See DataSourceException
157:             * @throws DataSourceException Thrown if there were any problems creating
158:             *         or connecting the datasource.
159:             */
160:            public DataStore createDataStore(Map params) throws IOException {
161:                // lookup will throw nice exceptions back to the client code
162:                String host = (String) HOST.lookUp(params);
163:                String user = (String) USER.lookUp(params);
164:                String passwd = (String) PASSWD.lookUp(params);
165:                Integer maxConn = (Integer) MAXCONN.lookUp(params);
166:                Integer minConn = (Integer) MINCONN.lookUp(params);
167:                Boolean validateConn = (Boolean) VALIDATECONN.lookUp(params);
168:                int port = ((Integer) PORT.lookUp(params)).intValue();
169:                String database = (String) DATABASE.lookUp(params);
170:                String namespace = (String) NAMESPACE.lookUp(params);
171:                Boolean wkbEnabled = (Boolean) WKBENABLED.lookUp(params);
172:
173:                if (!canProcess(params)) {
174:                    // Do this as a last sanity check.
175:                    LOGGER.warning("Can not process : " + params);
176:                    throw new IOException("The parameteres map isn't correct!!");
177:                }
178:
179:                boolean validate = validateConn != null
180:                        && validateConn.booleanValue();
181:                int maxActive = maxConn != null ? maxConn.intValue() : 10;
182:                int maxIdle = minConn != null ? minConn.intValue() : 4;
183:                DataSource ds = getDefaultDataSource(host, user, passwd, port,
184:                        database, maxActive, maxIdle, validate);
185:
186:                MySQLDataStore store;
187:                if (namespace != null) {
188:                    store = new MySQLDataStore(ds, null, namespace);
189:                } else {
190:                    store = new MySQLDataStore(ds);
191:                }
192:                if (wkbEnabled != null)
193:                    store.setWKBEnabled(wkbEnabled.booleanValue());
194:                return store;
195:            }
196:
197:            public static ManageableDataSource getDefaultDataSource(
198:                    String host, String user, String passwd, int port,
199:                    String database, int maxActive, int minIdle,
200:                    boolean validate) throws DataSourceException {
201:                // this one will have to wait for another iteration over the code
202:                //        String url = "jdbc:mysql://" + host + ":" + port + "/" + database + "?useCursorFetch=true&defaultFetchSize=100";
203:                String url = "jdbc:mysql://" + host + ":" + port + "/"
204:                        + database;
205:                String driver = "com.mysql.jdbc.Driver";
206:                return DataSourceUtil.buildDefaultDataSource(url, driver, user,
207:                        passwd, maxActive, minIdle,
208:                        validate ? "select version()" : null, false, 0);
209:            }
210:
211:            /**
212:             * Postgis cannot create a new database.
213:             *
214:             * @param params
215:             *
216:             *
217:             * @throws IOException See UnsupportedOperationException
218:             * @throws UnsupportedOperationException Cannot create new database
219:             */
220:            public DataStore createNewDataStore(Map params) throws IOException {
221:                throw new UnsupportedOperationException(
222:                        "MySQL cannot create a new Database");
223:            }
224:
225:            /**
226:             * @return "MySQL"
227:             */
228:            public String getDisplayName() {
229:                return "MySQL";
230:            }
231:
232:            /**
233:             * Describe the nature of the datasource constructed by this factory.
234:             *
235:             * @return A human readable description that is suitable for inclusion in a
236:             *         list of available datasources.  Currently uses the string "MySQL Database"
237:             */
238:            public String getDescription() {
239:                return "MySQL Database";
240:            }
241:
242:            //    /**
243:            //     *
244:            //     */
245:            //    public DataSourceMetadataEnity createMetadata( Map params ) throws IOException {
246:            //        String host = (String) HOST.lookUp(params);
247:            //        String user = (String) USER.lookUp(params);
248:            //        String port = (String) PORT.lookUp(params);
249:            //        String database = (String) DATABASE.lookUp(params);
250:            //        return new DataSourceMetadataEnity( host+"port", database, "MySQL connection to "+host+" as "+user );
251:            //    }
252:
253:            /**
254:             * Test to see if this datastore is available, if it has all the
255:             * appropriate libraries to construct a datastore.  This datastore just
256:             * returns true for now.  This method is used for gui apps, so as to not
257:             * advertise data store capabilities they don't actually have.
258:             *
259:             * @return <tt>true</tt> if and only if this factory is available to create
260:             *         DataStores.
261:             */
262:            public boolean isAvailable() {
263:                try {
264:                    Class.forName(DRIVER_CLASS);
265:                } catch (ClassNotFoundException cnfe) {
266:                    LOGGER.warning("MySQL data sources are not available: "
267:                            + cnfe.getMessage());
268:                    return false;
269:                }
270:                return true;
271:            }
272:
273:            /**
274:             * Describe parameters.
275:             *
276:             *
277:             * @see org.geotools.data.DataStoreFactorySpi#getParametersInfo()
278:             */
279:            public Param[] getParametersInfo() {
280:                return new Param[] { DBTYPE, HOST, PORT, DATABASE, USER,
281:                        PASSWD, MAXCONN, MINCONN, VALIDATECONN, NAMESPACE,
282:                        WKBENABLED };
283:            }
284:
285:            /**
286:             * Returns the implementation hints. The default implementation returns en empty map.
287:             */
288:            public Map getImplementationHints() {
289:                return Collections.EMPTY_MAP;
290:            }
291:        }
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