com.quinsoft.zeidon.standardoe.CommitToRestServer Maven / Gradle / Ivy
/**
This file is part of the Zeidon Java Object Engine (Zeidon JOE).
Zeidon JOE is free software: you can redistribute it and/or modify
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
(at your option) any later version.
Zeidon JOE is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with Zeidon JOE. If not, see viewList;
private Task task;
private CommitOptions options;
private Application application;
private List originalList;
/**
* Set of the OIs in the original views.
*/
private Set originalOiSet;
/**
* URL that specifies the server. E.g. "http://localhost:8080"
*/
private String serverUrl;
/**
* The fully qualified url, including the path.
* E.g. "http://localhost:8080/activate/APP-NAME".
*/
private String url;
/**
* Map that lets logic find and EI by tags. The tag is the EntityKey of the original
* EIs (before commit) and the EI is from the new OIs.
*/
private Map tagMap;
/**
* True if there are EIs in the list of views that are linked to EI's that
* belong to OIs outside of this commit. This will have some impact on how
* we merge the results from the remote server.
*/
private boolean hasExternallyLinkedInstances = false;
@Override
public void init( Task task, List list, CommitOptions options )
{
this.task = task;
this.viewList = new ArrayList();
this.options = options;
this.application = options.getApplication();
originalList = list;
originalOiSet = new HashSet();
for ( View v : list )
{
if ( application == null )
v.getApplication();
ViewImpl newView = ((InternalView) v).getViewImpl();
ObjectInstance oi = newView.getObjectInstance();
if ( ! originalOiSet.contains( oi ) )
{
originalOiSet.add( oi );
viewList.add( newView );
}
}
if ( viewList.size() != 1 )
throw new ZeidonException( "Committing via http currently only supports a single view at a time." );
serverUrl = options.getOiSourceUrl();
url = String.format( "%s/%s/%s", serverUrl, application.getName(), viewList.get( 0 ).getLodDef().getName() );
getTask().log().debug( "Committing to REST URL: %s", url );
assert serverUrl.startsWith( "http://" ) || serverUrl.startsWith( "https://" ) : "Unexpected oiSourceUrl " + serverUrl;
}
@Override
public List commit()
{
try
{
// copyEntityKeysToTags();
String json = task.serializeOi().asJson().withIncremental().addViews( viewList ).toStringWriter().toString();
List views = makePostCall( json );
if ( views.size() != 1 )
throw new ZeidonException( "Something went wrong: we have the wrong number of views" );
ViewImpl internalView = ((InternalView) views.get( 0 )).getViewImpl();
viewList.get( 0 ).replaceObjectInstance( internalView.getObjectInstance() );
// supersedeEis( views );
return originalList;
}
catch ( Exception e )
{
throw ZeidonException.wrapException( e );
}
}
/**
* This takes the views returned from the server and updates the original EIs to point
* to the new EIs.
*
* @param newViews Views returned from the server.
*/
private void supersedeEis( List newViews )
{
// Create a map of the tags that points to the new EIs.
createTagMap( newViews );
// Loop through all the EIs in the original OIs and set them to be superseded
// by the new EIs.
for ( ObjectInstance origOi: originalOiSet )
{
ObjectInstance newOi = null;
for ( EntityInstanceImpl origEi = origOi.getRootEntityInstance();
origEi != null;
origEi = origEi.getNextHier() )
{
String tag = origEi.getTag();
assert ! StringUtils.isBlank( tag ) : "Tag is blank!";
EntityInstanceImpl newEi = tagMap.get( tag );
if ( newEi == null )
{
// If we get here then the original EI should have been deleted. We can't
// verify that because it's possible that it was deleted by the commit constraint
// which is only run on the server. We'll set the prev/next pointers to isolate
// this EI.
}
else
{
newOi = newEi.getObjectInstance();
// Update any linked instances to be linked with the new EI.
for ( EntityInstanceImpl linked: origEi.getLinkedInstances() )
{
// If the linked EI is part of the current commit then skip it
// because it will be handled as part of the main loop.
if ( originalOiSet.contains( linked.getObjectInstance() ) )
continue;
// Reset the linked instance to be linked with newEi.
linked.linkInstances( newEi );
linked.setCreated( false );
linked.setUpdated( false );
}
// Set the next version. This will effectively update any cursors pointing at
// origEi.
origEi.setNextVersion( newEi );
}
// It's possible a cursor is pointing to this EI. Set prev/next pointers to
// null so everything else can be GC'd.
origEi.setEiPointersToNull();
} // for each EI...
if ( newOi == null )
{
// If we get here then there are *no* EI's from the origOi that are in the new
// OIs. This can happen if all the EI's were deleted. Reset origOi to indicate
// that it's empty.
origOi.setRootEntityInstance( null );
}
else
{
// TODO: copy OI settings, set root EI.
origOi.setRootEntityInstance( newOi.getRootEntityInstance() );
}
origOi.setUpdated( false );
origOi.setUpdatedFile( false );
} // for each OI...
}
private void createTagMap(List views)
{
tagMap = new HashMap();
for ( View v : views )
{
ObjectInstance oi = ((ViewImpl) v).getObjectInstance();
for ( EntityInstanceImpl ei = oi.getRootEntityInstance();
ei != null;
ei = ei.getNextHier() )
{
tagMap.put( ei.getTag(), ei );
}
}
}
private List makePostCall( String json )
{
String stringResponse = null;
CloseableHttpResponse response = null;
try
{
HttpPost post = new HttpPost( url );
StringEntity entity = new StringEntity( json );
post.setEntity( entity );
post.setHeader( "Content-Type", "application/json" );
response = ZeidonHttpClient.getClient( task, application ).callPost( post );
InputStream stream = response.getEntity().getContent();
StatusLine status = response.getStatusLine();
task.log().info( "Status from http activate = %s", status );
int statusCode = status.getStatusCode();
// If we're in debug mode, print out the results.
if ( task.log().isDebugEnabled() || statusCode != 200 )
{
StringWriter writer = new StringWriter();
IOUtils.copy(stream, writer, "UTF-8");
stringResponse = writer.toString();
task.log().debug( "REST response: %s", stringResponse );
stream = IOUtils.toInputStream(stringResponse, "UTF-8");
}
if ( statusCode != 200 )
throw new ZeidonException( "http activate failed with status %s", status );
List views = new DeserializeOi( getTask() )
.asJson()
.fromInputStream( stream )
.activate();
return views;
}
catch ( Exception e )
{
throw ZeidonException.wrapException( e ).appendMessage( "web URL = %s", url );
}
finally
{
if ( response != null )
{
EntityUtils.consumeQuietly(response.getEntity());
IOUtils.closeQuietly( response );
}
}
}
/**
* Copy the EntityKeys to the tag. We'll use these to merge the OIs returned from the server.
* Also sets hasExternallyLinkedInstances.
*/
private void copyEntityKeysToTags()
{
for ( ObjectInstance oi: originalOiSet )
{
for ( EntityInstanceImpl ei = oi.getRootEntityInstance();
ei != null;
ei = ei.getNextHier() )
{
ei.setTag( Long.toString( ei.getEntityKey() ) );
// Check to see if any linked instances are outside of the OI set.
if ( ! hasExternallyLinkedInstances ) // Have we already determined there are external EIs?
{
// No. Loop through linked instances to see if they belong to an OI that
// is not part of this commit.
for ( EntityInstanceImpl linked : ei.getLinkedInstances() )
{
if ( ! originalOiSet.contains( linked.getObjectInstance() ) )
{
hasExternallyLinkedInstances = true;
break; // We don't need to search any more.
}
}
}
}
}
}
private Task getTask()
{
return task;
}
}
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