{"id":1442,"date":"2014-04-24T16:42:29","date_gmt":"2014-04-24T14:42:29","guid":{"rendered":"http:\/\/hasselba.ch\/blog\/?p=1442"},"modified":"2014-04-24T16:42:29","modified_gmt":"2014-04-24T14:42:29","slug":"problems-with-handles-when-the-same-document-is-not-the-same","status":"publish","type":"post","link":"https:\/\/hasselba.ch\/blog\/?p=1442","title":{"rendered":"Problems with Handles: When the same document is not the same"},"content":{"rendered":"

Disclaimer: This will work in Java, SSJS and Lotus Script.
\n<\/em><\/p>\n

When opening the same document from the same database in different instances, and then recycle one of them, the other documents will be recycled too, because the handle to the underlying C object are the same.<\/p>\n

This SSJS example…<\/p>\n

<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n<xp:view xmlns:xp=\"http:\/\/www.ibm.com\/xsp\/core\">\r\n\r\n\u00a0\u00a0 \u00a0<xp:label id=\"labelDemo\">\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<xp:this.value>\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<![CDATA[#{javascript:\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0var dbCur:NotesDatabase = session.getCurrentDatabase();\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0var dbOther:NotesDatabase =\u00a0 session.getCurrentDatabase();\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0var docCur:NotesDocument = dbCur.getDocumentByUNID( \"E5CA138B7F5A21E5C1257C190068DBA9\" );\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0var docOther:NotesDocument = dbOther.getDocumentByUNID( \"E5CA138B7F5A21E5C1257C190068DBA9\" );\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0docCur.recycle();\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return docOther.getUniversalID();\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}]]>\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<\/xp:this.value>\r\n\u00a0\u00a0 \u00a0<\/xp:label>\r\n\r\n<\/xp:view><\/code><\/pre>\n
… fails, because docOther<\/em> is recycled too.<\/p>\n
\"\"<\/p>\n
But if you open the database dbOther<\/em> after initializing the database object, the handles are not the same. Then, the recycling of the document won’t affect the other instance of the same object:<\/p>\n
<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n<xp:view xmlns:xp=\"http:\/\/www.ibm.com\/xsp\/core\">\r\n\r\n\u00a0\u00a0 \u00a0<xp:label id=\"labelDemo\">\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<xp:this.value>\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<![CDATA[#{javascript:\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0var dbCur:NotesDatabase = session.getCurrentDatabase();\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0var dbOther:NotesDatabase = session.getDatabase( \"\", \"\" );\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0dbOther.openByReplicaID( dbCur.getServer(), dbCur.getReplicaID() );\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0var docCur:NotesDocument = dbCur.getDocumentByUNID( \"E5CA138B7F5A21E5C1257C190068DBA9\" );\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0var docOther:NotesDocument = dbOther.getDocumentByUNID( \"E5CA138B7F5A21E5C1257C190068DBA9\" );\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0docCur.recycle();\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return docOther.getUniversalID();\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}]]>\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<\/xp:this.value>\r\n\u00a0\u00a0 \u00a0<\/xp:label>\r\n\r\n<\/xp:view><\/code><\/pre>\n
\"\"<\/p>\n
In Lotus Script, you can fall into the trap when doing something like this:<\/p>\n
Dim session As New NotesSession\r\nDim dbCur As NotesDatabase\r\nDim dcCur As NotesDocumentCollection\r\nDim dbOther As NotesDatabase\r\nDim docOther As NotesDocument\r\n\r\n' open current database & create a document collection\r\nSet dbCur = session.Currentdatabase\r\nSet dcCur = dbCur.CreatedocumentCollection()\r\n\r\n' open the current database again \u00a0\r\nSet dbOther = New NotesDatabase( \"\",\"\" )\r\ndbOther.Open dbCur.Server, dbCur.Filepath\r\n\r\n' get a document...\r\nSet docOther = dbOther.Alldocuments.Getfirstdocument()\r\n\r\n' ... and add it to the collection\r\ndcCur.Adddocument docOther<\/code><\/pre>\n
This will result in a „Document is from a different database<\/em>“ error:<\/p>\n
\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"
Disclaimer: This will work in Java, SSJS and Lotus Script. When opening the same document from the same database in different instances, and then recycle one of them, the other documents will be recycled too, because the handle to the … Weiterlesen →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[89,9,20],"tags":[7,31,4,80],"class_list":["post-1442","post","type-post","status-publish","format-standard","hentry","category-java","category-javascript","category-lotus-script","tag-domino","tag-java","tag-js","tag-lotus-script"],"_links":{"self":[{"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1442","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1442"}],"version-history":[{"count":5,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1442\/revisions"}],"predecessor-version":[{"id":1447,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1442\/revisions\/1447"}],"wp:attachment":[{"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1442"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1442"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hasselba.ch\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1442"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}