@Override
    public String getConfig(final String dataId) {
        return this.apolloClient.getItemValue(dataId);
    }
Instantiates a new apollo data changed listener.

@param apolloClient the apollo client
shenyu-admin-listener/shenyu-admin-listener-apollo/src/main/java/org/apache/shenyu/admin/listener/apollo/ApolloDataChangedListener.java