Examples of ObjectCache

com.almende.util.ObjectCache
The Class ObjectCache.
com.dooapp.gaedo.blueprints.ObjectCache
A cache implementation, that should allow less memory consumption of gaedo @author ndx
com.j256.ormlite.dao.ObjectCache
Database connection for Android. @author kevingalligan, graywatson
com.pugh.sockso.cache.ObjectCache
The object cache implements an in memory data store
net.sf.swarmcache.ObjectCache
org.apache.hadoop.hive.ql.exec.ObjectCache
ObjectCache. Interface for maintaining objects associated with a task.
org.apache.jackrabbit.ocm.manager.cache.ObjectCache
Interface use for an object cache. @author Lombart Christophe
org.apache.nutch.util.ObjectCache
org.apache.ojb.broker.cache.ObjectCache
The ObjectCache stores all Objects loaded by the {@link org.apache.ojb.broker.PersistenceBroker} from a DB.When the PersistenceBroker tries to get an Object by its Primary key values it first lookups the cache if the object has been already loaded and cached.

Using an ObjectCache has several advantages: - it increases performance as it reduces DB lookups. - it allows to perform circular lookups (as by crossreferenced objects) that would result in non-terminating loops without such a cache. This will be internally handled by OJB, no need to take care of this. - it maintains the uniqueness of objects as any Db row will be mapped to exactly one object.

This interface allows to have userdefined Cache implementations. The ObjectCacheFactory is responsible for generating cache instances. by default it uses the OJB {@link ObjectCacheDefaultImpl}.

Note: Each {@link org.apache.ojb.broker.PersistenceBroker} wasassociated with its own ObjectCache instance at creation time.
{@link ObjectCacheFactory} is responsible for creating ObjectCacheinstances. To make the ObjectCache implementation work, a constructor with {@link org.apache.ojb.broker.PersistenceBroker} and{@link java.util.Properties} as arguments or only PersistenceBrokerargument is needed. @author Thomas Mahler @author Armin Waibel @version $Id: ObjectCache.java,v 1.9.2.3 2005/12/21 22:24:15 tomdz Exp $

org.apache.pig.backend.hadoop.executionengine.tez.runtime.ObjectCache
org.openmim.infrastructure.ObjectCache

Examples of org.apache.nutch.util.ObjectCache

  public Parser getParserById(String id) throws ParserNotFound {


    Extension[] extensions = this.extensionPoint.getExtensions();
    Extension parserExt = null;


    ObjectCache objectCache = ObjectCache.get(conf);
    
    if (id != null) {
      parserExt = getExtension(extensions, id);
    }
    if (parserExt == null) {
      parserExt = getExtensionFromAlias(extensions, id);
    }


    if (parserExt == null) {
      throw new ParserNotFound("No Parser Found for id [" + id + "]");
    }
    
    // first check the cache           
    if (objectCache.getObject(parserExt.getId()) != null) {
      return (Parser) objectCache.getObject(parserExt.getId());


    // if not found in cache, instantiate the Parser    
    } else {
      try {
        Parser p = (Parser) parserExt.getExtensionInstance();
        objectCache.setObject(parserExt.getId(), p);
        return p;
      } catch (PluginRuntimeException e) {
        if (LOG.isWarnEnabled()) {
          LOG.warn("Canno initialize parser " +
                   parserExt.getDescriptor().getPluginId() +

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Examples of org.apache.nutch.util.ObjectCache

   *         If none, returns <code>null</code>.
   */
  @SuppressWarnings("unchecked")
  protected List<Extension> getExtensions(String contentType) {
    
    ObjectCache objectCache = ObjectCache.get(conf);
    // First of all, tries to clean the content-type
    String type = null;
    type = MimeUtil.cleanMimeType(contentType);




    List<Extension> extensions = (List<Extension>) objectCache.getObject(type);


    // Just compare the reference:
    // if this is the empty list, we know we will find no extension.
    if (extensions == EMPTY_EXTENSION_LIST) {
      return null;
    }
    
    if (extensions == null) {
      extensions = findExtensions(type);
      if (extensions != null) {
        objectCache.setObject(type, extensions);
      } else {
        // Put the empty extension list into cache
        // to remember we don't know any related extension.
        objectCache.setObject(type, EMPTY_EXTENSION_LIST);
      }
    }
    return extensions;
  }

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Examples of org.apache.nutch.util.ObjectCache

  private FetchScheduleFactory() {}                   // no public ctor


  /** Return the FetchSchedule implementation. */
  public synchronized static FetchSchedule getFetchSchedule(Configuration conf) {
    String clazz = conf.get("db.fetch.schedule.class", DefaultFetchSchedule.class.getName());
    ObjectCache objectCache = ObjectCache.get(conf);
    FetchSchedule impl = (FetchSchedule)objectCache.getObject(clazz);
    if (impl == null) {
      try {
        LOG.info("Using FetchSchedule impl: " + clazz);
        Class<?> implClass = Class.forName(clazz);
        impl = (FetchSchedule)implClass.newInstance();
        impl.setConf(conf);
        objectCache.setObject(clazz, impl);
      } catch (Exception e) {
        throw new RuntimeException("Couldn't create " + clazz, e);
      }
    }
    return impl;

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Examples of org.apache.nutch.util.ObjectCache

  private Map<String, String> keyMap = new HashMap<String, String>();
  private Map<String, String> copyMap = new HashMap<String, String>();
  private String uniqueKey = "id";
  
  public static synchronized SolrMappingReader getInstance(Configuration conf) {
    ObjectCache cache = ObjectCache.get(conf);
    SolrMappingReader instance = (SolrMappingReader)cache.getObject(SolrMappingReader.class.getName());
    if (instance == null) {
      instance = new SolrMappingReader(conf);
      cache.setObject(SolrMappingReader.class.getName(), instance);
    }
    return instance;
  }

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Examples of org.apache.nutch.util.ObjectCache

    }
  }
  
  public static CollectionManager getCollectionManager(Configuration conf) {
    String key = "collectionmanager";
    ObjectCache objectCache = ObjectCache.get(conf);
    CollectionManager impl = (CollectionManager)objectCache.getObject(key);
    if (impl == null) {
      try {
        if (LOG.isInfoEnabled()) {
          LOG.info("Instantiating CollectionManager");
        }
        impl=new CollectionManager(conf);
        objectCache.setObject(key,impl);
      } catch (Exception e) {
        throw new RuntimeException("Couldn't create CollectionManager",e);
      }
    }
    return impl;

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Examples of org.apache.nutch.util.ObjectCache


  public URLNormalizers(Configuration conf, String scope) {
    this.conf = conf;
    this.extensionPoint = PluginRepository.get(conf).getExtensionPoint(
            URLNormalizer.X_POINT_ID);
    ObjectCache objectCache = ObjectCache.get(conf);
    
    if (this.extensionPoint == null) {
      throw new RuntimeException("x point " + URLNormalizer.X_POINT_ID
              + " not found.");
    }


    normalizers = (URLNormalizer[])objectCache.getObject(URLNormalizer.X_POINT_ID + "_" + scope);
    if (normalizers == null) {
      normalizers = getURLNormalizers(scope);
    }
    if (normalizers == EMPTY_NORMALIZERS) {
      normalizers = (URLNormalizer[])objectCache.getObject(URLNormalizer.X_POINT_ID + "_" + SCOPE_DEFAULT);
      if (normalizers == null) {
        normalizers = getURLNormalizers(SCOPE_DEFAULT);
      }
    }

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Examples of org.apache.nutch.util.ObjectCache

   *         scope.
   * @throws PluginRuntimeException
   */
  URLNormalizer[] getURLNormalizers(String scope) {
    List<Extension> extensions = getExtensions(scope);
    ObjectCache objectCache = ObjectCache.get(conf);
    
    if (extensions == EMPTY_EXTENSION_LIST) {
      return EMPTY_NORMALIZERS;
    }
    
    List<URLNormalizer> normalizers = new Vector<URLNormalizer>(extensions.size());


    Iterator<Extension> it = extensions.iterator();
    while (it.hasNext()) {
      Extension ext = it.next();
      URLNormalizer normalizer = null;
      try {
        // check to see if we've cached this URLNormalizer instance yet
        normalizer = (URLNormalizer) objectCache.getObject(ext.getId());
        if (normalizer == null) {
          // go ahead and instantiate it and then cache it
          normalizer = (URLNormalizer) ext.getExtensionInstance();
          objectCache.setObject(ext.getId(), normalizer);
        }
        normalizers.add(normalizer);
      } catch (PluginRuntimeException e) {
        e.printStackTrace();
        LOG.warn("URLNormalizers:PluginRuntimeException when "

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Examples of org.apache.nutch.util.ObjectCache

   * @return a list of extensions to be used for this scope. If none, returns
   *         empty list.
   * @throws PluginRuntimeException
   */
  private List<Extension> getExtensions(String scope) {
    ObjectCache objectCache = ObjectCache.get(conf);
    List<Extension> extensions = 
      (List<Extension>) objectCache.getObject(URLNormalizer.X_POINT_ID + "_x_"
                                                + scope);


    // Just compare the reference:
    // if this is the empty list, we know we will find no extension.
    if (extensions == EMPTY_EXTENSION_LIST) {
      return EMPTY_EXTENSION_LIST;
    }


    if (extensions == null) {
      extensions = findExtensions(scope);
      if (extensions != null) {
        objectCache.setObject(URLNormalizer.X_POINT_ID + "_x_" + scope, extensions);
      } else {
        // Put the empty extension list into cache
        // to remember we don't know any related extension.
        objectCache.setObject(URLNormalizer.X_POINT_ID + "_x_" + scope, EMPTY_EXTENSION_LIST);
        extensions = EMPTY_EXTENSION_LIST;
      }
    }
    return extensions;
  }

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Examples of org.apache.nutch.util.ObjectCache

  private ExtensionPoint extensionPoint;
  private ParsePluginList parsePluginList;


  public ParserFactory(Configuration conf) {
    this.conf = conf;
    ObjectCache objectCache = ObjectCache.get(conf);
    this.extensionPoint = PluginRepository.get(conf).getExtensionPoint(
        Parser.X_POINT_ID);
    this.parsePluginList = (ParsePluginList)objectCache.getObject(ParsePluginList.class.getName());
    if (this.parsePluginList == null) {
      this.parsePluginList = new ParsePluginsReader().parse(conf);
      objectCache.setObject(ParsePluginList.class.getName(), this.parsePluginList);
    }


    if (this.extensionPoint == null) {
      throw new RuntimeException("x point " + Parser.X_POINT_ID + " not found.");
    }

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Examples of org.apache.nutch.util.ObjectCache

  throws ParserNotFound {
    
    List<Parser> parsers = null;
    List<Extension> parserExts = null;
    
    ObjectCache objectCache = ObjectCache.get(conf);
    
    // TODO once the MimeTypes is available
    // parsers = getExtensions(MimeUtils.map(contentType));
    // if (parsers != null) {
    //   return parsers;
    // }
    // Last Chance: Guess content-type from file url...
    // parsers = getExtensions(MimeUtils.getMimeType(url));


    parserExts = getExtensions(contentType);
    if (parserExts == null) {
      throw new ParserNotFound(url, contentType);
    }


    parsers = new Vector<Parser>(parserExts.size());
    for (Iterator i=parserExts.iterator(); i.hasNext(); ){
      Extension ext = (Extension) i.next();
      Parser p = null;
      try {
        //check to see if we've cached this parser instance yet
        p = (Parser) objectCache.getObject(ext.getId());
        if (p == null) {
          // go ahead and instantiate it and then cache it
          p = (Parser) ext.getExtensionInstance();
          objectCache.setObject(ext.getId(),p);
        }
        parsers.add(p);
      } catch (PluginRuntimeException e) {
        if (LOG.isWarnEnabled()) {
          e.printStackTrace(LogUtil.getWarnStream(LOG));

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