org.objectweb.cjdbc.controller.cache.result.ResultCacheColumn Class Reference

Inheritance diagram for org.objectweb.cjdbc.controller.cache.result.ResultCacheColumn:

[legend]Collaboration diagram for org.objectweb.cjdbc.controller.cache.result.ResultCacheColumn:

[legend]List of all members.

Public Member Functions
	ResultCacheColumn (int maxEntries, int pendingTimeout)
void	processAddToCache (CacheEntry qe)
boolean	isUpdateNecessary (UpdateRequest request)
String	getName ()
Protected Member Functions
void	processWriteNotify (AbstractWriteRequest request)

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Detailed Description

This is a query cache implementation with a column granularity:

• COLUMN: column granularity, entries in the cache are invalidated based on column dependencies

Author:

Emmanuel Cecchet

Nicolas Modrzyk

Version:

1.0

Definition at line 51 of file ResultCacheColumn.java.

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Constructor & Destructor Documentation

org.objectweb.cjdbc.controller.cache.result.ResultCacheColumn.ResultCacheColumn (  int  maxEntries, int  pendingTimeout )

Builds a new ResultCache with a Column granularity. Parameters: maxEntries  maximum number of entries pendingTimeout  pending timeout for concurrent queries Definition at line 59 of file ResultCacheColumn.java. { super(maxEntries, pendingTimeout); parsingGranularity = ParsingGranularities.COLUMN; }

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Member Function Documentation

String org.objectweb.cjdbc.controller.cache.result.ResultCacheColumn.getName (   )  [virtual]

See also: org.objectweb.cjdbc.controller.cache.result.ResultCache.getName() Implements org.objectweb.cjdbc.controller.cache.result.ResultCache. Definition at line 142 of file ResultCacheColumn.java. { return "column"; }

boolean org.objectweb.cjdbc.controller.cache.result.ResultCacheColumn.isUpdateNecessary (  UpdateRequest  request  )  [virtual]

See also: org.objectweb.cjdbc.controller.cache.result.AbstractResultCache.isUpdateNecessary(org.objectweb.cjdbc.common.sql.UpdateRequest) Implements org.objectweb.cjdbc.controller.cache.result.ResultCache. Definition at line 108 of file ResultCacheColumn.java. { return true; }

void org.objectweb.cjdbc.controller.cache.result.ResultCacheColumn.processAddToCache (  CacheEntry  qe  )  [virtual]

See also: org.objectweb.cjdbc.controller.cache.result.ResultCache.processAddToCache(CacheEntry) Implements org.objectweb.cjdbc.controller.cache.result.ResultCache. Definition at line 68 of file ResultCacheColumn.java. References org.objectweb.cjdbc.controller.cache.result.schema.CacheDatabaseColumn.addCacheEntry(), org.objectweb.cjdbc.controller.cache.result.schema.CacheDatabaseTable.addCacheEntry(), org.objectweb.cjdbc.controller.cache.result.schema.CacheDatabaseTable.getColumn(), org.objectweb.cjdbc.common.sql.schema.TableColumn.getColumnName(), org.objectweb.cjdbc.controller.cache.result.schema.CacheDatabaseTable.getColumns(), org.objectweb.cjdbc.common.sql.SelectRequest.getFrom(), org.objectweb.cjdbc.controller.cache.result.entries.CacheEntry.getRequest(), org.objectweb.cjdbc.common.sql.SelectRequest.getSelect(), org.objectweb.cjdbc.controller.cache.result.schema.CacheDatabaseSchema.getTable(), org.objectweb.cjdbc.common.sql.schema.TableColumn.getTableName(), org.objectweb.cjdbc.common.sql.SelectRequest.getWhere(), and org.objectweb.cjdbc.common.log.Trace.warn(). { SelectRequest request = qe.getRequest(); ArrayList selectedColumns = request.getSelect(); // Update the tables columns dependencies if (selectedColumns == null || selectedColumns.isEmpty()) { logger .warn("No parsing of select clause found - Fallback to table granularity"); for (Iterator i = request.getFrom().iterator(); i.hasNext();) { CacheDatabaseTable table = cdbs.getTable((String) i.next()); table.addCacheEntry(qe); // Add all columns, entries will be added below. ArrayList columns = table.getColumns(); for (int j = 0; j < columns.size(); j++) { ((CacheDatabaseColumn) columns.get(j)).addCacheEntry(qe); } return; } } for (Iterator i = selectedColumns.iterator(); i.hasNext();) { TableColumn tc = (TableColumn) i.next(); cdbs.getTable(tc.getTableName()).getColumn(tc.getColumnName()) .addCacheEntry(qe); } if (request.getWhere() != null) for (Iterator i = request.getWhere().iterator(); i.hasNext();) { TableColumn tc = (TableColumn) i.next(); cdbs.getTable(tc.getTableName()).getColumn(tc.getColumnName()) .addCacheEntry(qe); } }

void org.objectweb.cjdbc.controller.cache.result.ResultCacheColumn.processWriteNotify (  AbstractWriteRequest  request  )  [protected, virtual]

See also: org.objectweb.cjdbc.controller.cache.result.ResultCache.processWriteNotify(org.objectweb.cjdbc.common.sql.AbstractWriteRequest) Implements org.objectweb.cjdbc.controller.cache.result.ResultCache. Definition at line 116 of file ResultCacheColumn.java. References org.objectweb.cjdbc.controller.cache.result.schema.CacheDatabaseTable.getColumn(), org.objectweb.cjdbc.common.sql.schema.TableColumn.getColumnName(), org.objectweb.cjdbc.common.sql.AbstractWriteRequest.getColumns(), org.objectweb.cjdbc.common.sql.AbstractRequest.getSQL(), org.objectweb.cjdbc.controller.cache.result.schema.CacheDatabaseSchema.getTable(), org.objectweb.cjdbc.common.sql.schema.TableColumn.getTableName(), org.objectweb.cjdbc.common.sql.AbstractWriteRequest.getTableName(), org.objectweb.cjdbc.controller.cache.result.schema.CacheDatabaseColumn.invalidateAll(), org.objectweb.cjdbc.controller.cache.result.schema.CacheDatabaseTable.invalidateAll(), org.objectweb.cjdbc.common.sql.AbstractWriteRequest.isAlter(), and org.objectweb.cjdbc.common.log.Trace.warn(). { // Sanity check if (request.getColumns() == null) { logger.warn("No column parsing found - Fallback to table granularity (" + request.getSQL() + ")"); cdbs.getTable(request.getTableName()).invalidateAll(); return; } if (request.isAlter()) { cdbs.getTable(request.getTableName()).invalidateAll(); return; } for (Iterator i = request.getColumns().iterator(); i.hasNext();) { TableColumn tc = (TableColumn) i.next(); cdbs.getTable(tc.getTableName()).getColumn(tc.getColumnName()) .invalidateAll(); } }

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The documentation for this class was generated from the following file:

• ResultCacheColumn.java

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