Examples of org.apache.derby.iapi.store.access.FileResource

Package org.apache.derby.iapi.store.access

Examples of org.apache.derby.iapi.store.access.FileResource

org.apache.derby.iapi.store.access.FileResource
Management of file resources within a database. Suitable for jar files, images etc.
A file resource is identified by the pair (name,generationId). Name is an arbitrary String supplied by the caller. GenerationId is a non-repeating sequence number constructed by the database. Within a database a (name,generationId) pair uniquely identifies a version of a file resource for all time. Newer generation numbers reflect newer versions of the file.
A database supports the concept of a designated current version of a fileResource. The management of the current version is transactional. The following rules apply
1. Adding a FileResource makes the added version the current version
2. Removing a FileResource removes the current version of the resource. After this operation the database holds no current version of the FileResoure.
3. Replacing a FileResource removes the current version of the resource.
For the benefit of replication, a database optionally retains historic versions of stored files. These old versions are useful when processing old transactions in the stage.

      throw StandardException.newException(SQLState.LANG_FILE_DOES_NOT_EXIST, sqlName,schemaName);


    long generationId = fid.getGenerationId();


        ContextManager cm = ContextService.getFactory().getCurrentContextManager();
    FileResource fr = af.getTransaction(cm).getFileHandler();


    String externalName = JarUtil.mkExternalName(schemaName, sqlName, fr.getSeparatorChar());


    return fr.getAsFile(externalName, generationId);
  }

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      throw StandardException.newException(SQLState.LANG_FILE_DOES_NOT_EXIST, sqlName,schemaName);


    long generationId = fid.getGenerationId();


        ContextManager cm = ContextService.getFactory().getCurrentContextManager();
    FileResource fr = af.getTransaction(cm).getFileHandler();


    String externalName = JarUtil.mkExternalName(schemaName, sqlName, fr.getSeparatorChar());


    return fr.getAsFile(externalName, generationId);
  }

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     throws StandardException
  {
    if (!removeAtOnce)
      return false;


    FileResource fr = ((RawTransaction) xact).getDataFactory().getFileHandler();


    fileToGo = fr.getAsFile(name, generationId);


    if (fileToGo == null)
      return false;


        return fileToGo.exists();

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    if (fid == null)
      throw StandardException.newException(SQLState.LANG_FILE_DOES_NOT_EXIST, sqlName,schemaName);


    long generationId = fid.getGenerationId();


    FileResource fr = af.getTransaction(ddc.getContextManager()).getFileHandler();


    String externalName = org.apache.derby.impl.sql.execute.JarDDL.mkExternalName(schemaName, sqlName, fr.getSeparatorChar());


    Object f = fr.getAsFile(externalName, generationId);
    if (f instanceof java.io.File)
      return f;


    try {
      return fr.getAsStream(externalName, generationId);
    } catch (java.io.IOException ioe) {
            throw StandardException.newException(SQLState.LANG_FILE_ERROR, ioe, ioe.toString());    
    }
  }

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      throw StandardException.newException(SQLState.LANG_FILE_DOES_NOT_EXIST, sqlName,schemaName);


    long generationId = fid.getGenerationId();


        ContextManager cm = ContextService.getFactory().getCurrentContextManager();
    FileResource fr = af.getTransaction(cm).getFileHandler();


    String externalName = JarUtil.mkExternalName(schemaName, sqlName, fr.getSeparatorChar());


    return fr.getAsFile(externalName, generationId);
  }

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      throw StandardException.newException(SQLState.LANG_FILE_DOES_NOT_EXIST, sqlName,schemaName);


    long generationId = fid.getGenerationId();


        ContextManager cm = ContextService.getFactory().getCurrentContextManager();
    FileResource fr = af.getTransaction(cm).getFileHandler();


    String externalName = JarUtil.mkExternalName(schemaName, sqlName, fr.getSeparatorChar());


    return fr.getAsFile(externalName, generationId);
  }

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        {
            scanController.close();
        }


        Iterator i = schemas.keySet().iterator();
        FileResource fh = tc.getFileHandler();


        // remove those directories with their contents
        while(i.hasNext()) {
            fh.removeJarDir(
                    FileResource.JAR_DIRECTORY_NAME +
                    File.separatorChar +
                    (String)i.next());
        }
    }

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      throw StandardException.newException(SQLState.LANG_FILE_DOES_NOT_EXIST, sqlName,schemaName);


    long generationId = fid.getGenerationId();


        ContextManager cm = ContextService.getFactory().getCurrentContextManager();
    FileResource fr = af.getTransaction(cm).getFileHandler();


    String externalName = JarUtil.mkExternalName(schemaName, sqlName, fr.getSeparatorChar());


    return fr.getAsFile(externalName, generationId);
  }

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      throw StandardException.newException(SQLState.LANG_FILE_DOES_NOT_EXIST, sqlName,schemaName);


    long generationId = fid.getGenerationId();


        ContextManager cm = ContextService.getFactory().getCurrentContextManager();
    FileResource fr = af.getTransaction(cm).getFileHandler();


        String externalName = JarUtil.mkExternalName(
            fid.getUUID(), schemaName, sqlName, fr.getSeparatorChar());


    return fr.getAsFile(externalName, generationId);
  }

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        {
            scanController.close();
        }


        Iterator<String> i = schemas.keySet().iterator();
        FileResource fh = tc.getFileHandler();


        // remove those directories with their contents
        while(i.hasNext()) {
            fh.removeJarDir(
                    FileResource.JAR_DIRECTORY_NAME +
                    File.separatorChar +
                    i.next());
        }
    }

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Related Classes of org.apache.derby.iapi.store.access.FileResource

org.apache.derby.impl.db.BasicDatabase

org.apache.derby.impl.sql.catalog.DataDictionaryImpl

org.apache.derby.impl.sql.execute.JarUtil

org.apache.derby.impl.store.raw.data.RemoveFileOperation

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