root / trunk / extensions / extSDE / src / com / iver / cit / gvsig / sde / gui / sdewizard2 / SingleSDEConnectionManager.java @ 11193
History | View | Annotate | Download (7.85 KB)
| 1 |
package com.iver.cit.gvsig.sde.gui.sdewizard2; |
|---|---|
| 2 |
|
| 3 |
import java.sql.SQLException; |
| 4 |
import java.util.ArrayList; |
| 5 |
import java.util.HashMap; |
| 6 |
import java.util.Iterator; |
| 7 |
|
| 8 |
import org.apache.log4j.Logger; |
| 9 |
|
| 10 |
import com.esri.sde.sdk.client.SeConnection; |
| 11 |
import com.esri.sde.sdk.client.SeException; |
| 12 |
import com.iver.cit.gvsig.fmap.drivers.sde.VectorialSDEDriver; |
| 13 |
import com.iver.cit.gvsig.fmap.layers.LayerFactory; |
| 14 |
|
| 15 |
/**
|
| 16 |
* Utility class to handle connections properly. One connection instance per
|
| 17 |
* (db, user, gvsig session)
|
| 18 |
*
|
| 19 |
* @author jldominguez
|
| 20 |
*
|
| 21 |
*/
|
| 22 |
public class SingleSDEConnectionManager { |
| 23 |
|
| 24 |
private static Logger logger = Logger.getLogger(SingleSDEConnectionManager.class.getName()); |
| 25 |
private static SingleSDEConnectionManager single_instance = null; |
| 26 |
private HashMap connections = new HashMap(); |
| 27 |
|
| 28 |
/**
|
| 29 |
* Non-public to avoid unwanted instances.
|
| 30 |
*
|
| 31 |
*/
|
| 32 |
protected SingleSDEConnectionManager() {
|
| 33 |
|
| 34 |
} |
| 35 |
|
| 36 |
/**
|
| 37 |
* Singleton model to keep single instances.
|
| 38 |
*
|
| 39 |
* @return single instance
|
| 40 |
*/
|
| 41 |
public static SingleSDEConnectionManager instance() { |
| 42 |
if (single_instance == null) { |
| 43 |
single_instance = new SingleSDEConnectionManager();
|
| 44 |
} |
| 45 |
return single_instance;
|
| 46 |
} |
| 47 |
|
| 48 |
/**
|
| 49 |
* Utility metho to find a connection with its parameters
|
| 50 |
* given the connection object.
|
| 51 |
*
|
| 52 |
* @param co the connection object
|
| 53 |
* @return
|
| 54 |
*/
|
| 55 |
public ConnectionWithParamsSDE findConnection(SeConnection co) {
|
| 56 |
|
| 57 |
Iterator iter = connections.keySet().iterator();
|
| 58 |
while (iter.hasNext()) {
|
| 59 |
String keyitem = (String) iter.next(); |
| 60 |
ConnectionWithParamsSDE cwp = (ConnectionWithParamsSDE) connections.get(keyitem); |
| 61 |
if (cwp.getConnection() == co) {
|
| 62 |
return cwp;
|
| 63 |
} |
| 64 |
} |
| 65 |
return null; |
| 66 |
} |
| 67 |
|
| 68 |
|
| 69 |
/**
|
| 70 |
* Creates a new connection with its parameters if not created yet.
|
| 71 |
*
|
| 72 |
* @param _drvName driver name
|
| 73 |
* @param _user user name
|
| 74 |
* @param _pw password
|
| 75 |
* @param _name connection name
|
| 76 |
* @param _host host url
|
| 77 |
* @param _port port number as string
|
| 78 |
* @param _db databade name
|
| 79 |
* @param _connected whether or not to connect the connection
|
| 80 |
* @return the connection with parameters object
|
| 81 |
* @throws SQLException
|
| 82 |
*/
|
| 83 |
public ConnectionWithParamsSDE getConnection (
|
| 84 |
String _drvName,
|
| 85 |
String _user,
|
| 86 |
String _pw,
|
| 87 |
String _name,
|
| 88 |
String _host,
|
| 89 |
String _port,
|
| 90 |
String _db,
|
| 91 |
boolean _connected
|
| 92 |
) throws SQLException { |
| 93 |
|
| 94 |
VectorialSDEDriver drv = getInstanceFromName(_drvName); |
| 95 |
String conn_str = drv.getConnectionString(_host, _port, _db, _user, _pw);
|
| 96 |
|
| 97 |
String key = getConnectionKey(_drvName, _host, _port, _user, _db, _name);
|
| 98 |
|
| 99 |
if (!connections.containsKey(key)) {
|
| 100 |
|
| 101 |
ConnectionWithParamsSDE cwp = null;
|
| 102 |
|
| 103 |
if (_connected) {
|
| 104 |
SeConnection new_connection = null;
|
| 105 |
try {
|
| 106 |
new_connection = new SeConnection(_host, Integer.parseInt(_port), _db, _user, _pw); |
| 107 |
} catch (NumberFormatException e) { |
| 108 |
e.printStackTrace(); |
| 109 |
} catch (SeException e) {
|
| 110 |
e.printStackTrace(); |
| 111 |
} |
| 112 |
|
| 113 |
cwp = new ConnectionWithParamsSDE(
|
| 114 |
conn_str, |
| 115 |
new_connection, |
| 116 |
_drvName, |
| 117 |
_user, |
| 118 |
_pw, |
| 119 |
_name, |
| 120 |
_host, |
| 121 |
_port, |
| 122 |
_db, |
| 123 |
true);
|
| 124 |
} else {
|
| 125 |
|
| 126 |
cwp = new ConnectionWithParamsSDE(
|
| 127 |
conn_str, |
| 128 |
null,
|
| 129 |
_drvName, |
| 130 |
_user, |
| 131 |
null,
|
| 132 |
_name, |
| 133 |
_host, |
| 134 |
_port, |
| 135 |
_db, |
| 136 |
false);
|
| 137 |
} |
| 138 |
connections.put(key, cwp); |
| 139 |
} |
| 140 |
|
| 141 |
ConnectionWithParamsSDE _cwp = (ConnectionWithParamsSDE) connections.get(key); |
| 142 |
|
| 143 |
if (_cwp.getName().compareTo(_name) != 0) { |
| 144 |
// connections.remove(key);
|
| 145 |
_cwp.setName(_name); |
| 146 |
connections.put(key, _cwp); |
| 147 |
} |
| 148 |
|
| 149 |
if ((!_cwp.isConnected()) && (_connected)) {
|
| 150 |
_cwp.connect(_pw); |
| 151 |
} |
| 152 |
|
| 153 |
return _cwp;
|
| 154 |
} |
| 155 |
|
| 156 |
/**
|
| 157 |
* Gets available open connections.
|
| 158 |
*
|
| 159 |
* @return array of open connections with parameters
|
| 160 |
*/
|
| 161 |
public ConnectionWithParamsSDE[] getConnectedConnections() { |
| 162 |
Iterator iter = connections.keySet().iterator();
|
| 163 |
if (!iter.hasNext()) return null; |
| 164 |
|
| 165 |
ArrayList aux = new ArrayList(); |
| 166 |
|
| 167 |
while (iter.hasNext()) {
|
| 168 |
ConnectionWithParamsSDE _cwp = |
| 169 |
(ConnectionWithParamsSDE) connections.get(iter.next()); |
| 170 |
if (_cwp.isConnected()) {
|
| 171 |
aux.add(_cwp); |
| 172 |
} |
| 173 |
} |
| 174 |
|
| 175 |
ConnectionWithParamsSDE[] resp = new ConnectionWithParamsSDE[aux.size()]; |
| 176 |
for (int i=0; i<aux.size(); i++) { |
| 177 |
resp[i] = (ConnectionWithParamsSDE) aux.get(i); |
| 178 |
} |
| 179 |
return resp;
|
| 180 |
} |
| 181 |
|
| 182 |
/**
|
| 183 |
* Gets all available connections.
|
| 184 |
*
|
| 185 |
* @return array of all connections with parameters
|
| 186 |
*/
|
| 187 |
public ConnectionWithParamsSDE[] getAllConnections() { |
| 188 |
Iterator iter = connections.keySet().iterator();
|
| 189 |
if (!iter.hasNext()) return null; |
| 190 |
|
| 191 |
ArrayList aux = new ArrayList(); |
| 192 |
|
| 193 |
while (iter.hasNext()) {
|
| 194 |
ConnectionWithParamsSDE _cwp = |
| 195 |
(ConnectionWithParamsSDE) connections.get(iter.next()); |
| 196 |
aux.add(_cwp); |
| 197 |
} |
| 198 |
|
| 199 |
ConnectionWithParamsSDE[] resp = new ConnectionWithParamsSDE[aux.size()]; |
| 200 |
for (int i=0; i<aux.size(); i++) { |
| 201 |
resp[i] = (ConnectionWithParamsSDE) aux.get(i); |
| 202 |
} |
| 203 |
return resp;
|
| 204 |
} |
| 205 |
|
| 206 |
/**
|
| 207 |
* Removes connection with its params.
|
| 208 |
*
|
| 209 |
* @param _cwp connection with params to be removed
|
| 210 |
*/
|
| 211 |
private void removeConnectionWP(ConnectionWithParamsSDE _cwp) { |
| 212 |
|
| 213 |
ArrayList keysToRemove = new ArrayList(); |
| 214 |
|
| 215 |
Iterator iter = connections.keySet().iterator();
|
| 216 |
while (iter.hasNext()) {
|
| 217 |
Object key = iter.next();
|
| 218 |
ConnectionWithParamsSDE cwp = (ConnectionWithParamsSDE) connections.get(key); |
| 219 |
if (cwp == _cwp) {
|
| 220 |
keysToRemove.add(key); |
| 221 |
} |
| 222 |
} |
| 223 |
for (int i=0; i<keysToRemove.size(); i++) { |
| 224 |
connections.remove(keysToRemove.get(i)); |
| 225 |
} |
| 226 |
} |
| 227 |
|
| 228 |
|
| 229 |
/**
|
| 230 |
* Closes and removes a connection with params object
|
| 231 |
*
|
| 232 |
* @param _cwp
|
| 233 |
* @return whether the connection was actually closed (false if the
|
| 234 |
* connection was not open at the start)
|
| 235 |
*/
|
| 236 |
public boolean closeAndRemove(ConnectionWithParamsSDE _cwp) { |
| 237 |
|
| 238 |
boolean it_was_open = true; |
| 239 |
|
| 240 |
try {
|
| 241 |
it_was_open = (_cwp.getConnection() != null) && (!_cwp.getConnection().isClosed());
|
| 242 |
if (_cwp.getConnection() != null) _cwp.getConnection().close(); |
| 243 |
removeConnectionWP(_cwp); |
| 244 |
} catch (Exception se) { |
| 245 |
logger.error("While closing connection: " + se.getMessage(), se);
|
| 246 |
return false; |
| 247 |
} |
| 248 |
logger.info("Connection successfully closed.");
|
| 249 |
return it_was_open;
|
| 250 |
} |
| 251 |
|
| 252 |
/**
|
| 253 |
* Called by the extension object when gvsig terminates.
|
| 254 |
*
|
| 255 |
*/
|
| 256 |
public void closeAllBeforeTerminate() { |
| 257 |
|
| 258 |
boolean ok = true; |
| 259 |
String key = ""; |
| 260 |
ConnectionWithParamsSDE cwp = null;
|
| 261 |
Iterator iter = connections.keySet().iterator();
|
| 262 |
while (iter.hasNext()) {
|
| 263 |
key = (String) iter.next();
|
| 264 |
cwp = (ConnectionWithParamsSDE) connections.get(key); |
| 265 |
|
| 266 |
if (cwp.getConnection() == null) continue; |
| 267 |
|
| 268 |
try {
|
| 269 |
cwp.getConnection().close(); |
| 270 |
} catch (SeException se) {
|
| 271 |
ok = false;
|
| 272 |
logger.error("While closing connection: " + se.getMessage(), se);
|
| 273 |
} |
| 274 |
} |
| 275 |
|
| 276 |
connections.clear(); |
| 277 |
|
| 278 |
if (ok) {
|
| 279 |
logger.info("Successfully closed all connections.");
|
| 280 |
} else {
|
| 281 |
logger.warn("Problems while closing all connections.");
|
| 282 |
} |
| 283 |
} |
| 284 |
|
| 285 |
/**
|
| 286 |
* Gets the objects key to be used in the inner hashmap
|
| 287 |
* @param _drvName driver name
|
| 288 |
* @param _host host's url
|
| 289 |
* @param _port port number
|
| 290 |
* @param _user user name
|
| 291 |
* @param _db db name
|
| 292 |
* @return ConnectionKey
|
| 293 |
*/
|
| 294 |
private static String getConnectionKey( |
| 295 |
String _drvName,
|
| 296 |
String _host,
|
| 297 |
String _port,
|
| 298 |
String _user,
|
| 299 |
String _db,
|
| 300 |
String _name) {
|
| 301 |
|
| 302 |
String resp = "_driver_" + _drvName.toLowerCase(); |
| 303 |
resp = resp + "_host_" + _host.toLowerCase();
|
| 304 |
resp = resp + "_port_" + _port;
|
| 305 |
resp = resp + "_user_" + _user.toLowerCase();
|
| 306 |
resp = resp + "_db_" + _db.toLowerCase();
|
| 307 |
resp = resp + "_name_" + _name.toLowerCase();
|
| 308 |
|
| 309 |
return resp;
|
| 310 |
} |
| 311 |
|
| 312 |
/**
|
| 313 |
* Utility method to instantiate a driver given its name.
|
| 314 |
*
|
| 315 |
* @param drvname driver name
|
| 316 |
* @return driver instance
|
| 317 |
*/
|
| 318 |
public static VectorialSDEDriver getInstanceFromName(String drvname) { |
| 319 |
|
| 320 |
VectorialSDEDriver _driver = null;
|
| 321 |
try {
|
| 322 |
_driver = (VectorialSDEDriver) LayerFactory.getDM().getDriver(drvname); |
| 323 |
} catch (Exception e) { |
| 324 |
logger.error("While getting driver instance: " + e.getMessage(), e);
|
| 325 |
} |
| 326 |
return _driver;
|
| 327 |
} |
| 328 |
|
| 329 |
|
| 330 |
|
| 331 |
|
| 332 |
|
| 333 |
} |