FSHooks.runPreRevPropChangeHook(myReposRootDir, propertyName, propertyValue, userName, revision, action);
if (FSHooks.isHooksEnabled()) { FSHooks.runPreRevPropChangeHook(myReposRootDir, propertyName, propertyValue, userName, revision, action); }
    public void setRevisionPropertyValue(long revision, String propertyName, String propertyValue) throws SVNException {        assertValidRevision(revision);        try {            openRepository();            if (!SVNProperty.isRegularProperty(propertyName)) {                SVNErrorMessage err = SVNErrorMessage.create(SVNErrorCode.REPOS_BAD_ARGS,                        "Storage of non-regular property ''{0}'' is disallowed through the repository interface, and could indicate a bug in your client", propertyName);                SVNErrorManager.error(err);            }            String userName = getUserName();            Map revProps = myFSFS.getRevisionProperties(revision);            String oldValue = (String)revProps.get(propertyName);            String action = null;            if (propertyValue == null) {                action = FSHooks.REVPROP_DELETE;            } else if (oldValue == null) {                action = FSHooks.REVPROP_ADD;            } else {                action = FSHooks.REVPROP_MODIFY;            }            FSHooks.runPreRevPropChangeHook(myReposRootDir, propertyName, propertyValue, userName, revision, action);            myFSFS.setRevisionProperty(revision, propertyName, propertyValue);            FSHooks.runPostRevPropChangeHook(myReposRootDir, propertyName, propertyValue, userName, revision, action);        } finally {            closeRepository();        }    }