RequestProcessor.java

/*
 * Copyright 2010-2011 Ning, Inc.
 *
 * Ning licenses this file to you under the Apache License, version 2.0
 * (the "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at:
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package com.ning.billing.payment;

import java.util.Arrays;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.eventbus.Subscribe;
import com.google.inject.Inject;
import com.ning.billing.account.api.Account;
import com.ning.billing.account.api.AccountUserApi;
import com.ning.billing.invoice.api.InvoiceCreationNotification;
import com.ning.billing.payment.api.Either;
import com.ning.billing.payment.api.PaymentApi;
import com.ning.billing.payment.api.PaymentError;
import com.ning.billing.payment.api.PaymentInfo;
import com.ning.billing.payment.provider.PaymentProviderPlugin;
import com.ning.billing.payment.provider.PaymentProviderPluginRegistry;
import com.ning.billing.util.eventbus.EventBus;
import com.ning.billing.util.eventbus.EventBus.EventBusException;

public class RequestProcessor {
    public static final String PAYMENT_PROVIDER_KEY = "paymentProvider";
    private final AccountUserApi accountUserApi;
    private final PaymentApi paymentApi;
    private final PaymentProviderPluginRegistry pluginRegistry;
    private final EventBus eventBus;

    private static final Logger log = LoggerFactory.getLogger(RequestProcessor.class);

    @Inject
    public RequestProcessor(AccountUserApi accountUserApi,
                            PaymentApi paymentApi,
                            PaymentProviderPluginRegistry pluginRegistry,
                            EventBus eventBus) {
        this.accountUserApi = accountUserApi;
        this.paymentApi = paymentApi;
        this.pluginRegistry = pluginRegistry;
        this.eventBus = eventBus;
    }

    @Subscribe
    public void receiveInvoice(InvoiceCreationNotification event) {
        log.info("Received invoice creation notification for account {} and invoice {}", event.getAccountId(), event.getInvoiceId());
        try {
            final Account account = accountUserApi.getAccountById(event.getAccountId());

            if (account == null) {
                log.info("could not process invoice payment: could not find a valid account for event {}", event);
            }
            else {
                List<Either<PaymentError, PaymentInfo>> results = paymentApi.createPayment(account, Arrays.asList(event.getInvoiceId().toString()));

                if (results.isEmpty()) {
                    eventBus.post(new PaymentError("unknown", "No payment processed"));
                }
                else {
                    Either<PaymentError, PaymentInfo> result = results.get(0);
                    eventBus.post(result.isLeft() ? result.getLeft() : result.getRight());
                }
            }
        }
        catch (EventBusException ex) {
            throw new RuntimeException(ex);
        }
    }

    @Subscribe
    public void receivePaymentInfoRequest(PaymentInfoRequest paymentInfoRequest) throws EventBusException {
        final Account account = accountUserApi.getAccountById(paymentInfoRequest.getAccountId());
        if (account == null) {
            log.info("could not process payment info request: could not find a valid account for event {}", paymentInfoRequest);
        }
        else {
            final String paymentProviderName = account.getFieldValue(PAYMENT_PROVIDER_KEY);
            final PaymentProviderPlugin plugin = pluginRegistry.getPlugin(paymentProviderName);

            Either<PaymentError, PaymentInfo> result = plugin.getPaymentInfo(paymentInfoRequest.getPaymentId());

            eventBus.post(result.isLeft() ? result.getLeft() : result.getRight());
        }
    }
}