diff --git a/src/net/java/sip/communicator/service/metahistory/MetaHistoryService.java b/src/net/java/sip/communicator/service/metahistory/MetaHistoryService.java
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+++ b/src/net/java/sip/communicator/service/metahistory/MetaHistoryService.java
@@ -0,0 +1,227 @@
+/*
+ * SIP Communicator, the OpenSource Java VoIP and Instant Messaging client.
+ *
+ * Distributable under LGPL license.
+ * See terms of license at gnu.org.
+ */
+package net.java.sip.communicator.service.metahistory;
+
+import java.util.*;
+import net.java.sip.communicator.service.history.event.*;
+
+/**
+ * The Meta History Service is wrapper around the other known
+ * history services. Query them all at once, sort the result and return all
+ * merged records in one collection.
+ *
+ * @author Damian Minkov
+ */
+public interface MetaHistoryService
+{
+    /**
+     * Returns all the records for the descriptor after the given date.
+     *
+     * @param services the services classnames we will query
+     * @param descriptor CallParticipant address(String),
+     *  MetaContact or ChatRoom.
+     * @param startDate Date the date of the first record to return
+     * @return Collection sorted result that conists of records returned from
+     *  the services we wrap
+     * @throws RuntimeException
+     */
+    public Collection<Object> findByStartDate(String[] services,
+            Object descriptor, Date startDate)
+        throws RuntimeException;
+
+    /**
+     * Returns all the records before the given date
+     *
+     * @param services the services classnames we will query
+     * @param descriptor CallParticipant address(String),
+     *  MetaContact or ChatRoom.
+     * @param endDate Date the date of the last record to return
+     * @return Collection sorted result that conists of records returned from
+     *  the services we wrap
+     * @throws RuntimeException
+     */
+    public Collection<Object> findByEndDate(String[] services,
+            Object descriptor, Date endDate)
+        throws RuntimeException;
+
+    /**
+     * Returns all the records between the given dates
+     *
+     * @param services the services classnames we will query
+     * @param descriptor CallParticipant address(String),
+     *  MetaContact or ChatRoom.
+     * @param startDate Date the date of the first record to return
+     * @param endDate Date the date of the last record to return
+     * @return Collection sorted result that conists of records returned from
+     *  the services we wrap
+     * @throws RuntimeException
+     */
+    public Collection<Object> findByPeriod(String[] services,
+            Object contact, Date startDate, Date endDate)
+        throws RuntimeException;
+
+    /**
+     * Returns all the records between the given dates and having the given
+     * keywords
+     *
+     * @param services the services classnames we will query
+     * @param descriptor CallParticipant address(String),
+     *  MetaContact or ChatRoom.
+     * @param startDate Date the date of the first record to return
+     * @param endDate Date the date of the last record to return
+     * @param keywords array of keywords
+     * @return Collection sorted result that conists of records returned from
+     *  the services we wrap
+     * @throws RuntimeException
+     */
+    public Collection<Object> findByPeriod(String[] services,
+            Object contact, Date startDate, Date endDate, String[] keywords)
+        throws RuntimeException;
+
+    /**
+     * Returns all the records between the given dates and having the given
+     * keywords
+     *
+     * @param services the services classnames we will query
+     * @param descriptor CallParticipant address(String),
+     *  MetaContact or ChatRoom.
+     * @param startDate Date the date of the first record to return
+     * @param endDate Date the date of the last record to return
+     * @param keywords array of keywords
+     * @param caseSensitive is keywords search case sensitive
+     * @return Collection sorted result that conists of records returned from
+     *  the services we wrap
+     * @throws RuntimeException
+     */
+    public Collection<Object> findByPeriod(String[] services,
+            Object contact, Date startDate, Date endDate,
+            String[] keywords, boolean caseSensitive)
+        throws RuntimeException;
+
+    /**
+     * Returns all the records having the given keyword
+     *
+     * @param services the services classnames we will query
+     * @param descriptor CallParticipant address(String),
+     *  MetaContact or ChatRoom.
+     * @param keyword keyword
+     * @return Collection sorted result that conists of records returned from
+     *  the services we wrap
+     * @throws RuntimeException
+     */
+    public Collection<Object> findByKeyword(String[] services,
+            Object contact, String keyword)
+        throws RuntimeException;
+
+    /**
+     * Returns all the records having the given keyword
+     *
+     * @param services the services classnames we will query
+     * @param descriptor CallParticipant address(String),
+     *  MetaContact or ChatRoom.
+     * @param keyword keyword
+     * @param caseSensitive is keywords search case sensitive
+     * @return Collection sorted result that conists of records returned from
+     *  the services we wrap
+     * @throws RuntimeException
+     */
+    Collection<Object> findByKeyword(String[] services,
+            Object contact, String keyword, boolean caseSensitive)
+        throws RuntimeException;
+
+    /**
+     * Returns all the records having the given keywords
+     *
+     * @param services the services classnames we will query
+     * @param contact CallParticipant address(String),
+     *  MetaContact or ChatRoom.
+     * @param keywords keyword
+     * @return Collection sorted result that conists of records returned from
+     *  the services we wrap
+     * @throws RuntimeException
+     */
+    public Collection<Object> findByKeywords(String[] services,
+            Object contact, String[] keywords)
+        throws RuntimeException;
+
+    /**
+     * Returns all the records having the given keywords
+     *
+     * @param services the services classnames we will query
+     * @param descriptor CallParticipant address(String),
+     *  MetaContact or ChatRoom.
+     * @param keywords keyword
+     * @param caseSensitive is keywords search case sensitive
+     * @return Collection sorted result that conists of records returned from
+     *  the services we wrap
+     * @throws RuntimeException
+     */
+    public Collection<Object> findByKeywords(String[] services,
+            Object contact, String[] keywords, boolean caseSensitive)
+        throws RuntimeException;
+
+    /**
+     * Returns the supplied number of recent records.
+     *
+     * @param services the services classnames we will query
+     * @param descriptor CallParticipant address(String),
+     *  MetaContact or ChatRoom.
+     * @param count messages count
+     * @return Collection sorted result that conists of records returned from
+     *  the services we wrap
+     * @throws RuntimeException
+     */
+    public Collection<Object> findLast(String[] services,
+            Object contact, int count)
+        throws RuntimeException;
+
+    /**
+     * Returns the supplied number of recent records after the given date
+     *
+     * @param services the services classnames we will query
+     * @param descriptor CallParticipant address(String),
+     *  MetaContact or ChatRoom.
+     * @param date messages after date
+     * @param count messages count
+     * @return Collection sorted result that conists of records returned from
+     *  the services we wrap
+     * @throws RuntimeException
+     */
+    public Collection<Object> findFirstMessagesAfter(String[] services,
+            Object contact, Date date, int count)
+        throws RuntimeException;
+
+    /**
+     * Returns the supplied number of recent records before the given date
+     *
+     * @param services the services classnames we will query
+     * @param descriptor CallParticipant address(String),
+     *  MetaContact or ChatRoom.
+     * @param date messages before date
+     * @param count messages count
+     * @return Collection sorted result that conists of records returned from
+     *  the services we wrap
+     * @throws RuntimeException
+     */
+    public Collection<Object> findLastMessagesBefore(String[] services,
+            Object contact, Date date, int count)
+        throws RuntimeException;
+
+    /**
+     * Adding progress listener for monitoring progress of search process
+     *
+     * @param listener HistorySearchProgressListener
+     */
+   public void addSearchProgressListener(HistorySearchProgressListener listener);
+
+   /**
+    * Removing progress listener
+    *
+    * @param listener HistorySearchProgressListener
+    */
+   public void removeSearchProgressListener(HistorySearchProgressListener listener);
+}