@Override
    public void add(SharedConnectionDefinition definition) {

        // Store definition by share key
        String shareKey = definition.getShareKey();
        connectionMap.put(shareKey, definition);

    }
Keeps track of the share key to SharedConnectionDefinition mapping.
extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/sharing/HashSharedConnectionMap.java