Undo fix for REPO-1022: MNT-16271. Tests working locally but race conditions are possible.

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/DEV/5.2.N/root@133098 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
Derek Hulley
2016-11-24 21:05:13 +00:00
parent b6358642e4
commit 5682ef0c34
2 changed files with 192 additions and 316 deletions

View File

@@ -1,133 +1,133 @@
/* /*
* #%L * #%L
* Alfresco Repository * Alfresco Repository
* %% * %%
* Copyright (C) 2005 - 2016 Alfresco Software Limited * Copyright (C) 2005 - 2016 Alfresco Software Limited
* %% * %%
* This file is part of the Alfresco software. * This file is part of the Alfresco software.
* If the software was purchased under a paid Alfresco license, the terms of * If the software was purchased under a paid Alfresco license, the terms of
* the paid license agreement will prevail. Otherwise, the software is * the paid license agreement will prevail. Otherwise, the software is
* provided under the following open source license terms: * provided under the following open source license terms:
* *
* Alfresco is free software: you can redistribute it and/or modify * Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by * it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or * the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version. * (at your option) any later version.
* *
* Alfresco is distributed in the hope that it will be useful, * Alfresco is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of * but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details. * GNU Lesser General Public License for more details.
* *
* You should have received a copy of the GNU Lesser General Public License * You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>. * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
* #L% * #L%
*/ */
package org.alfresco.repo.site; package org.alfresco.repo.site;
import java.io.Serializable; import java.io.Serializable;
import java.util.ArrayList; import java.util.ArrayList;
import java.util.Collections; import java.util.Collections;
import java.util.Comparator; import java.util.Comparator;
import java.util.Date; import java.util.Date;
import java.util.HashMap; import java.util.HashMap;
import java.util.HashSet; import java.util.HashSet;
import java.util.Iterator; import java.util.Iterator;
import java.util.LinkedList; import java.util.LinkedList;
import java.util.List; import java.util.List;
import java.util.Map; import java.util.Map;
import java.util.Set; import java.util.Set;
import java.util.SortedSet; import java.util.SortedSet;
import java.util.TreeSet; import java.util.TreeSet;
import java.util.regex.Matcher; import java.util.regex.Matcher;
import java.util.regex.Pattern; import java.util.regex.Pattern;
import org.alfresco.error.AlfrescoRuntimeException; import org.alfresco.error.AlfrescoRuntimeException;
import org.alfresco.events.types.Event; import org.alfresco.events.types.Event;
import org.alfresco.events.types.SiteManagementEvent; import org.alfresco.events.types.SiteManagementEvent;
import org.alfresco.model.ContentModel; import org.alfresco.model.ContentModel;
import org.alfresco.query.CannedQuery; import org.alfresco.query.CannedQuery;
import org.alfresco.query.CannedQueryFactory; import org.alfresco.query.CannedQueryFactory;
import org.alfresco.query.CannedQueryPageDetails; import org.alfresco.query.CannedQueryPageDetails;
import org.alfresco.query.CannedQueryParameters; import org.alfresco.query.CannedQueryParameters;
import org.alfresco.query.CannedQueryResults; import org.alfresco.query.CannedQueryResults;
import org.alfresco.query.CannedQuerySortDetails; import org.alfresco.query.CannedQuerySortDetails;
import org.alfresco.query.CannedQuerySortDetails.SortOrder; import org.alfresco.query.CannedQuerySortDetails.SortOrder;
import org.alfresco.query.PageDetails; import org.alfresco.query.PageDetails;
import org.alfresco.query.PagingRequest; import org.alfresco.query.PagingRequest;
import org.alfresco.query.PagingResults; import org.alfresco.query.PagingResults;
import org.alfresco.repo.activities.ActivityType; import org.alfresco.repo.activities.ActivityType;
import org.alfresco.repo.admin.SysAdminParams; import org.alfresco.repo.admin.SysAdminParams;
import org.alfresco.repo.cache.SimpleCache; import org.alfresco.repo.cache.SimpleCache;
import org.alfresco.repo.domain.node.NodeDAO; import org.alfresco.repo.domain.node.NodeDAO;
import org.alfresco.repo.events.EventPreparator; import org.alfresco.repo.events.EventPreparator;
import org.alfresco.repo.events.EventPublisher; import org.alfresco.repo.events.EventPublisher;
import org.alfresco.repo.node.NodeArchiveServicePolicies; import org.alfresco.repo.node.NodeArchiveServicePolicies;
import org.alfresco.repo.node.NodeArchiveServicePolicies.BeforePurgeNodePolicy; import org.alfresco.repo.node.NodeArchiveServicePolicies.BeforePurgeNodePolicy;
import org.alfresco.repo.node.NodeServicePolicies; import org.alfresco.repo.node.NodeServicePolicies;
import org.alfresco.repo.node.NodeServicePolicies.OnRestoreNodePolicy; import org.alfresco.repo.node.NodeServicePolicies.OnRestoreNodePolicy;
import org.alfresco.repo.node.getchildren.FilterProp; import org.alfresco.repo.node.getchildren.FilterProp;
import org.alfresco.repo.node.getchildren.FilterPropString; import org.alfresco.repo.node.getchildren.FilterPropString;
import org.alfresco.repo.node.getchildren.FilterPropString.FilterTypeString; import org.alfresco.repo.node.getchildren.FilterPropString.FilterTypeString;
import org.alfresco.repo.node.getchildren.GetChildrenCannedQuery; import org.alfresco.repo.node.getchildren.GetChildrenCannedQuery;
import org.alfresco.repo.node.getchildren.GetChildrenCannedQueryFactory; import org.alfresco.repo.node.getchildren.GetChildrenCannedQueryFactory;
import org.alfresco.repo.policy.BehaviourFilter; import org.alfresco.repo.policy.BehaviourFilter;
import org.alfresco.repo.policy.JavaBehaviour; import org.alfresco.repo.policy.JavaBehaviour;
import org.alfresco.repo.policy.PolicyComponent; import org.alfresco.repo.policy.PolicyComponent;
import org.alfresco.repo.search.impl.lucene.LuceneQueryParserException; import org.alfresco.repo.search.impl.lucene.LuceneQueryParserException;
import org.alfresco.repo.security.authentication.AuthenticationContext; import org.alfresco.repo.security.authentication.AuthenticationContext;
import org.alfresco.repo.security.authentication.AuthenticationUtil; import org.alfresco.repo.security.authentication.AuthenticationUtil;
import org.alfresco.repo.security.authentication.AuthenticationUtil.RunAsWork; import org.alfresco.repo.security.authentication.AuthenticationUtil.RunAsWork;
import org.alfresco.repo.security.permissions.AccessDeniedException; import org.alfresco.repo.security.permissions.AccessDeniedException;
import org.alfresco.repo.tenant.TenantService; import org.alfresco.repo.tenant.TenantService;
import org.alfresco.repo.tenant.TenantUtil; import org.alfresco.repo.tenant.TenantUtil;
import org.alfresco.repo.tenant.TenantUtil.TenantRunAsWork; import org.alfresco.repo.tenant.TenantUtil.TenantRunAsWork;
import org.alfresco.repo.transaction.RetryingTransactionHelper; import org.alfresco.repo.transaction.RetryingTransactionHelper;
import org.alfresco.repo.transaction.RetryingTransactionHelper.RetryingTransactionCallback; import org.alfresco.repo.transaction.RetryingTransactionHelper.RetryingTransactionCallback;
import org.alfresco.service.cmr.activities.ActivityService; import org.alfresco.service.cmr.activities.ActivityService;
import org.alfresco.service.cmr.dictionary.DictionaryService; import org.alfresco.service.cmr.dictionary.DictionaryService;
import org.alfresco.service.cmr.model.FileFolderService; import org.alfresco.service.cmr.model.FileFolderService;
import org.alfresco.service.cmr.model.FileInfo; import org.alfresco.service.cmr.model.FileInfo;
import org.alfresco.service.cmr.model.FileNotFoundException; import org.alfresco.service.cmr.model.FileNotFoundException;
import org.alfresco.service.cmr.preference.PreferenceService; import org.alfresco.service.cmr.preference.PreferenceService;
import org.alfresco.service.cmr.repository.ChildAssociationRef; import org.alfresco.service.cmr.repository.ChildAssociationRef;
import org.alfresco.service.cmr.repository.NodeRef; import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.cmr.repository.NodeService; import org.alfresco.service.cmr.repository.NodeService;
import org.alfresco.service.cmr.repository.StoreRef; import org.alfresco.service.cmr.repository.StoreRef;
import org.alfresco.service.cmr.repository.datatype.DefaultTypeConverter; import org.alfresco.service.cmr.repository.datatype.DefaultTypeConverter;
import org.alfresco.service.cmr.search.LimitBy; import org.alfresco.service.cmr.search.LimitBy;
import org.alfresco.service.cmr.search.ResultSet; import org.alfresco.service.cmr.search.ResultSet;
import org.alfresco.service.cmr.search.SearchParameters; import org.alfresco.service.cmr.search.SearchParameters;
import org.alfresco.service.cmr.search.SearchService; import org.alfresco.service.cmr.search.SearchService;
import org.alfresco.service.cmr.security.AccessPermission; import org.alfresco.service.cmr.security.AccessPermission;
import org.alfresco.service.cmr.security.AccessStatus; import org.alfresco.service.cmr.security.AccessStatus;
import org.alfresco.service.cmr.security.AuthorityService; import org.alfresco.service.cmr.security.AuthorityService;
import org.alfresco.service.cmr.security.AuthorityType; import org.alfresco.service.cmr.security.AuthorityType;
import org.alfresco.service.cmr.security.NoSuchPersonException; import org.alfresco.service.cmr.security.NoSuchPersonException;
import org.alfresco.service.cmr.security.PermissionService; import org.alfresco.service.cmr.security.PermissionService;
import org.alfresco.service.cmr.security.PersonService; import org.alfresco.service.cmr.security.PersonService;
import org.alfresco.service.cmr.security.PublicServiceAccessService; import org.alfresco.service.cmr.security.PublicServiceAccessService;
import org.alfresco.service.cmr.site.SiteInfo; import org.alfresco.service.cmr.site.SiteInfo;
import org.alfresco.service.cmr.site.SiteMemberInfo; import org.alfresco.service.cmr.site.SiteMemberInfo;
import org.alfresco.service.cmr.site.SiteService; import org.alfresco.service.cmr.site.SiteService;
import org.alfresco.service.cmr.site.SiteVisibility; import org.alfresco.service.cmr.site.SiteVisibility;
import org.alfresco.service.cmr.tagging.TaggingService; import org.alfresco.service.cmr.tagging.TaggingService;
import org.alfresco.service.namespace.NamespaceService; import org.alfresco.service.namespace.NamespaceService;
import org.alfresco.service.namespace.QName; import org.alfresco.service.namespace.QName;
import org.alfresco.service.transaction.TransactionService; import org.alfresco.service.transaction.TransactionService;
import org.alfresco.util.GUID; import org.alfresco.util.GUID;
import org.alfresco.util.Pair; import org.alfresco.util.Pair;
import org.alfresco.util.PropertyCheck; import org.alfresco.util.PropertyCheck;
import org.alfresco.util.PropertyMap; import org.alfresco.util.PropertyMap;
import org.alfresco.util.SearchLanguageConversion; import org.alfresco.util.SearchLanguageConversion;
import org.alfresco.util.registry.NamedObjectRegistry; import org.alfresco.util.registry.NamedObjectRegistry;
import org.apache.commons.logging.Log; import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory; import org.apache.commons.logging.LogFactory;
import org.json.JSONException; import org.json.JSONException;
import org.json.JSONObject; import org.json.JSONObject;
import org.springframework.context.ApplicationEvent; import org.springframework.context.ApplicationEvent;
import org.springframework.extensions.surf.util.AbstractLifecycleBean; import org.springframework.extensions.surf.util.AbstractLifecycleBean;
import org.springframework.extensions.surf.util.ParameterCheck; import org.springframework.extensions.surf.util.ParameterCheck;
/** /**
* Site Service Implementation. Also bootstraps the site DM stores. * Site Service Implementation. Also bootstraps the site DM stores.
@@ -1662,14 +1662,6 @@ public class SiteServiceImpl extends AbstractLifecycleBean implements SiteServic
final QName siteType = this.directNodeService.getType(nodeRef); final QName siteType = this.directNodeService.getType(nodeRef);
final String shortName = getSite(nodeRef).getShortName(); final String shortName = getSite(nodeRef).getShortName();
// If there is a live site, we must not wipe out the authority data.
// Authority data for sites is associated by a naming convention.
if (hasSite(shortName))
{
// A live site exists, so leave the authority data alone
return;
}
// Delete the associated groups // Delete the associated groups
AuthenticationUtil.runAs(new AuthenticationUtil.RunAsWork<Object>() AuthenticationUtil.runAs(new AuthenticationUtil.RunAsWork<Object>()
{ {
@@ -2430,7 +2422,7 @@ public class SiteServiceImpl extends AbstractLifecycleBean implements SiteServic
ACTIVITY_TOOL, getActivityUserData(authorityName, ""), authorityName); ACTIVITY_TOOL, getActivityUserData(authorityName, ""), authorityName);
} }
else if (authorityType == AuthorityType.GROUP) else if (authorityType == AuthorityType.GROUP)
{ {
String authorityDisplayName = authorityService.getAuthorityDisplayName(authorityName); String authorityDisplayName = authorityService.getAuthorityDisplayName(authorityName);
activityService.postActivity( activityService.postActivity(
ActivityType.SITE_GROUP_REMOVED, shortName, ActivityType.SITE_GROUP_REMOVED, shortName,
@@ -2530,43 +2522,43 @@ public class SiteServiceImpl extends AbstractLifecycleBean implements SiteServic
} }
}, AuthenticationUtil.SYSTEM_USER_NAME); }, AuthenticationUtil.SYSTEM_USER_NAME);
AuthorityType authorityType = AuthorityType.getAuthorityType(authorityName); AuthorityType authorityType = AuthorityType.getAuthorityType(authorityName);
String authorityDisplayName = authorityName; String authorityDisplayName = authorityName;
if (authorityType == AuthorityType.GROUP) if (authorityType == AuthorityType.GROUP)
{ {
authorityDisplayName = authorityService.getAuthorityDisplayName(authorityName); authorityDisplayName = authorityService.getAuthorityDisplayName(authorityName);
} }
if (currentRole == null) if (currentRole == null)
{ {
if (authorityType == AuthorityType.USER) if (authorityType == AuthorityType.USER)
{ {
activityService.postActivity( activityService.postActivity(
ActivityType.SITE_USER_JOINED, shortName, ActivityType.SITE_USER_JOINED, shortName,
ACTIVITY_TOOL, getActivityUserData(authorityDisplayName, role), authorityName); ACTIVITY_TOOL, getActivityUserData(authorityDisplayName, role), authorityName);
} }
else if (authorityType == AuthorityType.GROUP) else if (authorityType == AuthorityType.GROUP)
{ {
activityService.postActivity( activityService.postActivity(
ActivityType.SITE_GROUP_ADDED, shortName, ActivityType.SITE_GROUP_ADDED, shortName,
ACTIVITY_TOOL, getActivityGroupData(authorityDisplayName, role)); ACTIVITY_TOOL, getActivityGroupData(authorityDisplayName, role));
} }
} }
else else
{ {
if (authorityType == AuthorityType.USER) if (authorityType == AuthorityType.USER)
{ {
activityService.postActivity( activityService.postActivity(
ActivityType.SITE_USER_ROLE_UPDATE, shortName, ActivityType.SITE_USER_ROLE_UPDATE, shortName,
ACTIVITY_TOOL, getActivityUserData(authorityDisplayName, role)); ACTIVITY_TOOL, getActivityUserData(authorityDisplayName, role));
} }
else if (authorityType == AuthorityType.GROUP) else if (authorityType == AuthorityType.GROUP)
{ {
activityService.postActivity( activityService.postActivity(
ActivityType.SITE_GROUP_ROLE_UPDATE, shortName, ActivityType.SITE_GROUP_ROLE_UPDATE, shortName,
ACTIVITY_TOOL, getActivityGroupData(authorityDisplayName, role)); ACTIVITY_TOOL, getActivityGroupData(authorityDisplayName, role));
} }
} }
} }
else else

View File

@@ -1,28 +1,28 @@
/* /*
* #%L * #%L
* Alfresco Repository * Alfresco Repository
* %% * %%
* Copyright (C) 2005 - 2016 Alfresco Software Limited * Copyright (C) 2005 - 2016 Alfresco Software Limited
* %% * %%
* This file is part of the Alfresco software. * This file is part of the Alfresco software.
* If the software was purchased under a paid Alfresco license, the terms of * If the software was purchased under a paid Alfresco license, the terms of
* the paid license agreement will prevail. Otherwise, the software is * the paid license agreement will prevail. Otherwise, the software is
* provided under the following open source license terms: * provided under the following open source license terms:
* *
* Alfresco is free software: you can redistribute it and/or modify * Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by * it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or * the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version. * (at your option) any later version.
* *
* Alfresco is distributed in the hope that it will be useful, * Alfresco is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of * but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details. * GNU Lesser General Public License for more details.
* *
* You should have received a copy of the GNU Lesser General Public License * You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>. * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
* #L% * #L%
*/ */
package org.alfresco.repo.site; package org.alfresco.repo.site;
import java.io.Serializable; import java.io.Serializable;
@@ -1229,7 +1229,7 @@ public class SiteServiceImplTest extends BaseAlfrescoSpringTest
}, AuthenticationUtil.getAdminUserName()); }, AuthenticationUtil.getAdminUserName());
// Create a test site // Create a test site
String siteShortName = "testDeleteSite-" + GUID.generate(); String siteShortName = "testUpdateSite";
this.siteService.createSite(TEST_SITE_PRESET, siteShortName, TEST_TITLE, TEST_DESCRIPTION, SiteVisibility.PUBLIC); this.siteService.createSite(TEST_SITE_PRESET, siteShortName, TEST_TITLE, TEST_DESCRIPTION, SiteVisibility.PUBLIC);
SiteInfo siteInfo = this.siteService.getSite(siteShortName); SiteInfo siteInfo = this.siteService.getSite(siteShortName);
assertNotNull(siteInfo); assertNotNull(siteInfo);
@@ -1258,122 +1258,6 @@ public class SiteServiceImplTest extends BaseAlfrescoSpringTest
assertTrue(authorityService.authorityExists(testGroup)); assertTrue(authorityService.authorityExists(testGroup));
} }
@SuppressWarnings("deprecation")
public void testPurgeSiteSimple()
{
SiteService smallSiteService = (SiteService)this.applicationContext.getBean("siteService");
// Create a test group
final String testGroupName = "siteServiceImplTestGroup_" + GUID.generate();
String testGroup = AuthenticationUtil.runAs(
new AuthenticationUtil.RunAsWork<String>()
{
public String doWork() throws Exception
{
return authorityService.createAuthority(AuthorityType.GROUP, testGroupName);
}
}, AuthenticationUtil.getAdminUserName());
// Create a test site
String siteShortName = "testPurgeSite-" + GUID.generate();
this.siteService.createSite(TEST_SITE_PRESET, siteShortName, TEST_TITLE, TEST_DESCRIPTION, SiteVisibility.PUBLIC);
SiteInfo siteInfo = this.siteService.getSite(siteShortName);
assertNotNull(siteInfo);
// Add the test group as a member of the site
this.siteService.setMembership(siteShortName, testGroup, SiteModel.SITE_CONTRIBUTOR);
// Delete the site
this.siteService.deleteSite(siteShortName);
assertNull(this.siteService.getSite(siteShortName));
NodeRef archivedNodeRef = nodeArchiveService.getArchivedNode(siteInfo.getNodeRef());
assertTrue("Deleted sites can be recovered from the Trash.", nodeService.exists(archivedNodeRef));
// Commit these site structures
setComplete();
endTransaction();
// We now do two transactions that will be thrown away to handle the purge use cases
// Now purge the site.
RetryingTransactionCallback<Void> purgeWork = new RetryingTransactionCallback<Void>()
{
@Override
public Void execute() throws Throwable
{
// We already check that the authorities remain alive.
nodeArchiveService.purgeArchivedNode(archivedNodeRef); // service call starts a new txn
// Site-related groups should be wiped
assertFalse(authorityService.authorityExists(((SiteServiceImpl)smallSiteService).getSiteGroup(siteShortName, true)));
assertFalse(authorityService.authorityExists(((SiteServiceImpl) smallSiteService).getSiteGroup(siteShortName)));
Set<String> permissions = permissionService.getSettablePermissions(SiteModel.TYPE_SITE);
for (String permission : permissions)
{
String siteRoleGroup = ((SiteServiceImpl)smallSiteService).getSiteRoleGroup(siteShortName, permission, true);
assertFalse(authorityService.authorityExists(siteRoleGroup));
}
// Ensure that the added "normal" groups have not been deleted
assertTrue(authorityService.authorityExists(testGroup));
throw new RuntimeException("Expected $$");
}
};
try
{
transactionService.getRetryingTransactionHelper().doInTransaction(purgeWork);
}
catch (Exception e)
{
if (!e.getMessage().contains("$$"))
{
throw e;
}
}
// Create a new site and ensure that the purge does NOT wipe out the authorities ... but still works otherwise (MNT-16271)
RetryingTransactionCallback<Void> purgeWithExistingWork = new RetryingTransactionCallback<Void>()
{
@Override
public Void execute() throws Throwable
{
siteService.createSite(TEST_SITE_PRESET, siteShortName, TEST_TITLE, TEST_DESCRIPTION, SiteVisibility.PUBLIC);
// We already check that the authorities remain alive.
nodeArchiveService.purgeArchivedNode(archivedNodeRef); // service call starts a new txn
// Site-related groups should still exist
assertTrue(authorityService.authorityExists(((SiteServiceImpl)smallSiteService).getSiteGroup(siteShortName, true)));
assertTrue(authorityService.authorityExists(((SiteServiceImpl) smallSiteService).getSiteGroup(siteShortName)));
Set<String> permissions = permissionService.getSettablePermissions(SiteModel.TYPE_SITE);
for (String permission : permissions)
{
String siteRoleGroup = ((SiteServiceImpl)smallSiteService).getSiteRoleGroup(siteShortName, permission, true);
assertTrue(authorityService.authorityExists(siteRoleGroup));
}
// Ensure that the added "normal" groups have not been deleted
assertTrue(authorityService.authorityExists(testGroup));
throw new RuntimeException("Expected $$");
}
};
try
{
transactionService.getRetryingTransactionHelper().doInTransaction(purgeWithExistingWork);
}
catch (Exception e)
{
if (!e.getMessage().contains("$$"))
{
throw e;
}
}
// Start a new transaction to keep Spring's sequencing happy
startNewTransaction();
}
public void testIsPublic() public void testIsPublic()
{ {
RetryingTransactionCallback<Object> work = new RetryingTransactionCallback<Object>() RetryingTransactionCallback<Object> work = new RetryingTransactionCallback<Object>()