org.argeo.slc.core/src/main/java/org/argeo/slc/ant/SlcAntConfig.java

   1 package org.argeo.slc.ant;
   2
   3 import java.io.File;
   4 import java.io.FileInputStream;
   5 import java.io.IOException;
   6 import java.util.Map;
   7 import java.util.Properties;
   8 import java.util.StringTokenizer;
   9
  10 import org.springframework.util.Log4jConfigurer;
  11
  12 import org.apache.commons.logging.Log;
  13 import org.apache.commons.logging.LogFactory;
  14 import org.apache.tools.ant.Project;
  15
  16 /**
  17  * <p>
  18  * Manager and initializer of the properties required by SLC Ant.
  19  * </p>
  20  *
  21  * <p>
  22  * All properties described here will get a value one way or another (see below
  23  * for details)/ Each property will be accessible via Ant or Spring properties.
  24  * </p>
  25  *
  26  * <p>
  27  * The property <i>slc.rootFile</i> is set based on the location of the SLC
  28  * root property file found in the directory structure of a called Ant file. The
  29  * default name of this file is <b>slcRoot.properties</b> (can be set by
  30  * {@link #setSlcRootFileName(String)}). <br>
  31  * This property provides the absolute path to the unique SLC root property file
  32  * which marks the root of an Ant SLC tree structure.
  33  * </p>
  34  *
  35  * <p>
  36  * The property <i>slc.rootDir</i> is inferred from <i>slc.rootFile</i> and
  37  * provides a convenient shortcut to the root directory of the Ant files
  38  * directory structure.
  39  * </p>
  40  *
  41  * <p>
  42  * A few directory and file related properties can be set in the SLC root
  43  * property file (if they are not explicitly set their default values will be
  44  * used):
  45  *
  46  * <table border="1" cellspacing="0">
  47  * <tr>
  48  * <th>Property</th>
  49  * <th>Description</th>
  50  * <th>Default</th>
  51  * </tr>
  52  * <tr>
  53  * <td><i>slc.confDir</i></td>
  54  * <td>Directory where to find the various configuration files of a given SLC
  55  * Ant deployment</td>
  56  * <td>${slc.rootDir}/../conf</td>
  57  * </tr>
  58  * <tr>
  59  * <td><i>slc.workDir</i></td>
  60  * <td>Directory where data can be retrieved or generated: build outputs, test
  61  * inputs/outputs, test results, etc. The underlying directory structure is
  62  * specified by the specific SLC application.</td>
  63  * <td>${slc.rootDir}/../work</td>
  64  * </tr>
  65  * <tr>
  66  * <td><i>slc.propertyFileNames</i></td>
  67  * <td>Comma-separated list of the files names of the property files to load
  68  * from the conf directory. Having various files allows to separate between SLC
  69  * framework properties and properties specific to a given application built on
  70  * top of SLC. All will be available across Ant and Spring.</td>
  71  * <td>slc.properties</td>
  72  * </tr>
  73  * </table> <b>Note:</b> Only the properties above can be set in the SLC root
  74  * properties file. All other properties should be defined in the registered
  75  * conf files.
  76  * </p>
  77  *
  78  * <p>
  79  * Any property can be defined in the conf files defined in the SLC root
  80  * properties file (see above). SLC expects some which will have defaults but
  81  * can be overriden there. By convention they should be defined in the
  82  * <b>slc.properties</b> file, while application specific properties should be
  83  * defined in other conf files. This allows for a clean spearation between SLC
  84  * and the applications built on top of it:
  85  *
  86  * <table border="1" cellspacing="0">
  87  * <tr>
  88  * <th>Property</th>
  89  * <th>Description</th>
  90  * <th>Default</th>
  91  * </tr>
  92  * <tr>
  93  * <td><i>slc.applicationContext</i></td>
  94  * <td>Path to the root Spring application context file used by SLC Ant.</td>
  95  * <td>${slc.confDir}/applicationContext.xml</td>
  96  * </tr>
  97  * <tr>
  98  * <td><i>slc.defaultTestRun</i></td>
  99  * <td>Name of the {@link WritableTestRun} Spring bean that the
 100  * <code>slc.test</code> task will use by default. This can be overridden when
 101  * calling the task from Ant.</td>
 102  * <td>defaultTestRun</td>
 103  * </tr>
 104  * </table>
 105  * </p>
 106  */
 107 public class SlcAntConfig {
 108         // SLC ROOT PROPERTIES
 109         /** Property for the root file (SLC root property file). */
 110         public final static String ROOT_FILE_PROPERTY = "slc.rootFile";
 111         /** Property for the root dir (SLC root property file). */
 112         public final static String ROOT_DIR_PROPERTY = "slc.rootDir";
 113         /** Property for the conf dir (SLC root property file). */
 114         public final static String CONF_DIR_PROPERTY = "slc.confDir";
 115         /** Property for the work dir (SLC root property file). */
 116         public final static String WORK_DIR_PROPERTY = "slc.workDir";
 117         /**
 118          * Comma-separated list of property file names to load from the conf dir and
 119          * add to project user properties
 120          */
 121         public final static String PROPERTY_FILE_NAMES_PROPERTY = "slc.propertyFileNames";
 122
 123         // SLC CONF PROPERTIES
 124         /** Path to the root Spring application context */
 125         public static String APPLICATION_CONTEXT_PROPERTY = "slc.applicationContext";
 126         /** Name of the Spring bean used by default */
 127         public static String DEFAULT_TEST_RUN_PROPERTY = "slc.defaultTestRun";
 128
 129         // SLC LOCAL PROPERTIES
 130         /** Property for the dir label (SLC local property file). */
 131         public static String DIR_LABEL_PROPERTY = "slc.dirLabel";
 132
 133         private String slcRootFileName = "slcRoot.properties";
 134         private String slcLocalFileName = "slcLocal.properties";
 135
 136         /**
 137          * Retrieves or infers all properties and set them as project user
 138          * properties. All these properties will be set as project properties <b>if
 139          * they had not been set as project properties before</b> (like by
 140          * overriding through the standard Ant mechanisms).
 141          *
 142          * @param project
 143          *            the Ant <code>Project</code> being run.
 144          * @return whether the project could be initialized for SLC usage (e.g.
 145          *         presence of an SLC root file)
 146          */
 147         public boolean initProject(Project project) {
 148                 File projectBaseDir = project.getBaseDir();
 149                 File slcRootFile = findSlcRootFile(projectBaseDir);
 150                 if (slcRootFile == null) {
 151                         return false;
 152                 }
 153
 154                 // pass the project properties through the System properties
 155                 System.getProperties().putAll((Map<?, ?>) project.getUserProperties());
 156                 Properties all = new Properties();
 157                 all.putAll(System.getProperties());
 158                 prepareAllProperties(slcRootFile, all);
 159
 160                 Log log = LogFactory.getLog(this.getClass());
 161                 for (Object o : all.keySet()) {
 162                         String key = o.toString();
 163                         // System.out.println(key+"="+all.getProperty(key));
 164                         if (project.getUserProperty(key) == null) {// not already set
 165                         // if (log.isDebugEnabled())
 166                         // log.debug(key + "=" + all.getProperty(key));
 167                                 project.setUserProperty(key, all.getProperty(key));
 168                         }
 169                 }
 170                 return true;
 171         }
 172
 173         /**
 174          * Retrieves or infers all required properties.
 175          *
 176          * @param slcRootFile
 177          *            the location of the SLC root file
 178          *
 179          * @return the prepared properties. Note that it also contains the System
 180          *         and Ant properties which had previously been set.
 181          */
 182         public void prepareAllProperties(File slcRootFile, Properties all) {
 183                 try {
 184                         final String fileUrlPrefix = "";
 185
 186                         all.put(ROOT_FILE_PROPERTY, slcRootFile.getCanonicalPath());
 187                         // Remove basedir property in order to avoid conflict with Maven
 188                         if (all.containsKey("basedir"))
 189                                 all.remove("basedir");
 190
 191                         Properties rootProps = loadFile(slcRootFile.getCanonicalPath());
 192
 193                         final File confDir;
 194                         final File workDir;
 195                         // Root dir
 196                         final File rootDir = slcRootFile.getParentFile();
 197                         all.setProperty(ROOT_DIR_PROPERTY, fileUrlPrefix
 198                                         + rootDir.getCanonicalPath());
 199
 200                         // Conf dir
 201                         if (all.getProperty(CONF_DIR_PROPERTY) == null) {
 202                                 confDir = new File(rootProps.getProperty(CONF_DIR_PROPERTY,
 203                                                 rootDir.getAbsolutePath() + "/../conf"))
 204                                                 .getCanonicalFile();
 205                                 all.setProperty(CONF_DIR_PROPERTY, fileUrlPrefix
 206                                                 + confDir.getAbsolutePath());
 207                         } else {
 208                                 confDir = new File(all.getProperty(CONF_DIR_PROPERTY))
 209                                                 .getCanonicalFile();
 210                         }
 211
 212                         // Work dir
 213                         if (all.getProperty(WORK_DIR_PROPERTY) == null) {
 214                                 workDir = new File(rootProps.getProperty(WORK_DIR_PROPERTY,
 215                                                 rootDir.getAbsolutePath() + "/../work"))
 216                                                 .getCanonicalFile();
 217                                 all.setProperty(WORK_DIR_PROPERTY, fileUrlPrefix
 218                                                 + workDir.getAbsolutePath());
 219                         } else {
 220                                 workDir = new File(all.getProperty(WORK_DIR_PROPERTY))
 221                                                 .getCanonicalFile();
 222                         }
 223
 224                         // Properties from the conf dir files
 225                         Properties properties = new Properties();
 226                         StringTokenizer st = new StringTokenizer(rootProps.getProperty(
 227                                         PROPERTY_FILE_NAMES_PROPERTY, "slc.properties"), ",");
 228                         while (st.hasMoreTokens()) {
 229                                 String fileName = st.nextToken();
 230                                 properties.putAll(loadFile(confDir.getAbsolutePath()
 231                                                 + File.separator + fileName));
 232                         }
 233
 234                         for (Object o : properties.keySet()) {
 235                                 String key = o.toString();
 236                                 if (all.getProperty(key) == null) {// not already set
 237                                         all.setProperty(key, properties.getProperty(key));
 238                                 }
 239                         }
 240
 241                         // Default application context
 242                         if (all.getProperty(APPLICATION_CONTEXT_PROPERTY) == null) {
 243                                 all.setProperty(APPLICATION_CONTEXT_PROPERTY, confDir
 244                                                 .getAbsolutePath()
 245                                                 + "/applicationContext.xml");
 246                         }
 247                         // Default test run
 248                         if (all.getProperty(DEFAULT_TEST_RUN_PROPERTY) == null) {
 249                                 all.setProperty(DEFAULT_TEST_RUN_PROPERTY,
 250                                                 "defaultTestRun");
 251                         }
 252
 253                         // Default log4j
 254                         if (all.getProperty("log4j.configuration") == null) {
 255                                 System.setProperty("log4j.configuration", confDir
 256                                                 .getCanonicalPath()
 257                                                 + File.separator + "log4j.properties");
 258                                 // TODO: fix dependency to log4j
 259                                 Log4jConfigurer.initLogging(confDir.getCanonicalPath()
 260                                                 + File.separator + "log4j.properties");
 261                         }
 262                 } catch (Exception e) {
 263                         throw new SlcAntException("Unexpected exception while configuring",
 264                                         e);
 265                 }
 266         }
 267
 268         /** Loads the content of a file as <code>Properties</code>. */
 269         private Properties loadFile(String path) {
 270                 Properties p = new Properties();
 271                 try {
 272                         FileInputStream in = new FileInputStream(path);
 273                         p.load(in);
 274                         in.close();
 275                 } catch (IOException e) {
 276                         throw new SlcAntException("Cannot read SLC root file", e);
 277                 }
 278                 return p;
 279         }
 280
 281         /**
 282          * Looks for a file named {@link #getSlcLocalFileName()} in the directory,
 283          * loads it as properties file and return the value of the property
 284          * {@link #DIR_LABEL_PROPERTY}.
 285          */
 286         public String getDescriptionForDir(File dir) {
 287                 String description = dir.getName();
 288                 File slcLocal = new File(dir.getPath() + File.separator
 289                                 + getSlcLocalFileName());
 290                 if (slcLocal.exists()) {
 291                         Properties properties = loadFile(slcLocal.getAbsolutePath());
 292                         description = properties.getProperty(
 293                                         SlcAntConfig.DIR_LABEL_PROPERTY, description);
 294                 }
 295                 return description;
 296         }
 297
 298         /**
 299          * Recursively scans directories downwards until it find a file names as
 300          * defined by {@link #getSlcRootFileName()}.
 301          */
 302         public File findSlcRootFile(File dir) {
 303                 for (File file : dir.listFiles()) {
 304                         if (!file.isDirectory()
 305                                         && file.getName().equals(getSlcRootFileName())) {
 306                                 return file;
 307                         }
 308                 }
 309
 310                 File parentDir = dir.getParentFile();
 311                 if (parentDir == null) {
 312                         return null;// stop condition: not found
 313                 } else {
 314                         return findSlcRootFile(parentDir);
 315                 }
 316         }
 317
 318         /**
 319          * Gets the file name of the file marking the root directory, default being
 320          * <i>slcRoot.properties</i>.
 321          */
 322         public String getSlcRootFileName() {
 323                 return slcRootFileName;
 324         }
 325
 326         /** Sets the file name of the file marking the root directory. */
 327         public void setSlcRootFileName(String slcRootFileName) {
 328                 this.slcRootFileName = slcRootFileName;
 329         }
 330
 331         /**
 332          * Gets the file name of the file containing directory specific properties,
 333          * default being <i>slcLocal.properties</i>.
 334          */
 335         public String getSlcLocalFileName() {
 336                 return slcLocalFileName;
 337         }
 338
 339         /** Sets the file name of the file containing directory specific properties. */
 340         public void setSlcLocalFileName(String slcLocalFileName) {
 341                 this.slcLocalFileName = slcLocalFileName;
 342         }
 343
 344 }