components/camel-kubernetes/src/main/java/org/apache/camel/component/kubernetes/service_accounts/KubernetesServiceAccountsProducer.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.
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package org.apache.camel.component.kubernetes.service_accounts;

import java.util.Map;

import io.fabric8.kubernetes.api.model.DoneableServiceAccount;
import io.fabric8.kubernetes.api.model.ServiceAccount;
import io.fabric8.kubernetes.api.model.ServiceAccountList;
import io.fabric8.kubernetes.client.Watch;
import io.fabric8.kubernetes.client.Watcher;
import io.fabric8.kubernetes.client.dsl.FilterWatchListMultiDeletable;
import io.fabric8.kubernetes.client.dsl.NonNamespaceOperation;
import io.fabric8.kubernetes.client.dsl.Resource;
import org.apache.camel.Exchange;
import org.apache.camel.component.kubernetes.AbstractKubernetesEndpoint;
import org.apache.camel.component.kubernetes.KubernetesConstants;
import org.apache.camel.component.kubernetes.KubernetesOperations;
import org.apache.camel.support.DefaultProducer;
import org.apache.camel.support.MessageHelper;
import org.apache.camel.util.ObjectHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class KubernetesServiceAccountsProducer extends DefaultProducer {

    private static final Logger LOG = LoggerFactory.getLogger(KubernetesServiceAccountsProducer.class);

    public KubernetesServiceAccountsProducer(AbstractKubernetesEndpoint endpoint) {
        super(endpoint);
    }

    @Override
    public AbstractKubernetesEndpoint getEndpoint() {
        return (AbstractKubernetesEndpoint)super.getEndpoint();
    }

    @Override
    public void process(Exchange exchange) throws Exception {
        String operation;

        if (ObjectHelper.isEmpty(getEndpoint().getKubernetesConfiguration().getOperation())) {
            operation = exchange.getIn().getHeader(KubernetesConstants.KUBERNETES_OPERATION, String.class);
        } else {
            operation = getEndpoint().getKubernetesConfiguration().getOperation();
        }

        switch (operation) {

        case KubernetesOperations.LIST_SERVICE_ACCOUNTS:
            doList(exchange, operation);
            break;

        case KubernetesOperations.LIST_SERVICE_ACCOUNTS_BY_LABELS_OPERATION:
            doListServiceAccountsByLabels(exchange, operation);
            break;

        case KubernetesOperations.GET_SECRET_OPERATION:
            doGetServiceAccount(exchange, operation);
            break;

        case KubernetesOperations.CREATE_SERVICE_ACCOUNT_OPERATION:
            doCreateServiceAccount(exchange, operation);
            break;

        case KubernetesOperations.DELETE_SERVICE_ACCOUNT_OPERATION:
            doDeleteServiceAccount(exchange, operation);
            break;

        default:
            throw new IllegalArgumentException("Unsupported operation " + operation);
        }
    }

    protected void doList(Exchange exchange, String operation) throws Exception {
        ServiceAccountList saList = getEndpoint().getKubernetesClient().serviceAccounts().inAnyNamespace().list();
        MessageHelper.copyHeaders(exchange.getIn(), exchange.getOut(), true);
        exchange.getOut().setBody(saList.getItems());
    }

    protected void doListServiceAccountsByLabels(Exchange exchange, String operation) throws Exception {
        ServiceAccountList saList = null;
        Map<String, String> labels = exchange.getIn().getHeader(KubernetesConstants.KUBERNETES_SERVICE_ACCOUNTS_LABELS, Map.class);
        String namespaceName = exchange.getIn().getHeader(KubernetesConstants.KUBERNETES_NAMESPACE_NAME, String.class);
        if (!ObjectHelper.isEmpty(namespaceName)) {
            NonNamespaceOperation<ServiceAccount, ServiceAccountList, DoneableServiceAccount, Resource<ServiceAccount, DoneableServiceAccount>> serviceAccounts;
            serviceAccounts = getEndpoint().getKubernetesClient().serviceAccounts().inNamespace(namespaceName);
            for (Map.Entry<String, String> entry : labels.entrySet()) {
                serviceAccounts.withLabel(entry.getKey(), entry.getValue());
            }
            saList = serviceAccounts.list();
        } else {
            FilterWatchListMultiDeletable<ServiceAccount, ServiceAccountList, Boolean, Watch, Watcher<ServiceAccount>> serviceAccounts;
            serviceAccounts = getEndpoint().getKubernetesClient().serviceAccounts().inAnyNamespace();
            for (Map.Entry<String, String> entry : labels.entrySet()) {
                serviceAccounts.withLabel(entry.getKey(), entry.getValue());
            }
            saList = serviceAccounts.list();
        }

        MessageHelper.copyHeaders(exchange.getIn(), exchange.getOut(), true);
        exchange.getOut().setBody(saList.getItems());
    }

    protected void doGetServiceAccount(Exchange exchange, String operation) throws Exception {
        ServiceAccount sa = null;
        String saName = exchange.getIn().getHeader(KubernetesConstants.KUBERNETES_SERVICE_ACCOUNT_NAME, String.class);
        String namespaceName = exchange.getIn().getHeader(KubernetesConstants.KUBERNETES_NAMESPACE_NAME, String.class);
        if (ObjectHelper.isEmpty(saName)) {
            LOG.error("Get a specific Service Account require specify a Service Account name");
            throw new IllegalArgumentException("Get a specific Service Account require specify a Service Account name");
        }
        if (ObjectHelper.isEmpty(namespaceName)) {
            LOG.error("Get a specific Service Account require specify a namespace name");
            throw new IllegalArgumentException("Get a specific Service Account require specify a namespace name");
        }
        sa = getEndpoint().getKubernetesClient().serviceAccounts().inNamespace(namespaceName).withName(saName).get();

        MessageHelper.copyHeaders(exchange.getIn(), exchange.getOut(), true);
        exchange.getOut().setBody(sa);
    }

    protected void doCreateServiceAccount(Exchange exchange, String operation) throws Exception {
        ServiceAccount sa = null;
        String namespaceName = exchange.getIn().getHeader(KubernetesConstants.KUBERNETES_NAMESPACE_NAME, String.class);
        ServiceAccount saToCreate = exchange.getIn().getHeader(KubernetesConstants.KUBERNETES_SERVICE_ACCOUNT, ServiceAccount.class);
        if (ObjectHelper.isEmpty(namespaceName)) {
            LOG.error("Create a specific Service Account require specify a namespace name");
            throw new IllegalArgumentException("Create a specific Service Account require specify a namespace name");
        }
        if (ObjectHelper.isEmpty(saToCreate)) {
            LOG.error("Create a specific Service Account require specify a Service Account bean");
            throw new IllegalArgumentException("Create a specific Service Account require specify a Service Account bean");
        }
        sa = getEndpoint().getKubernetesClient().serviceAccounts().inNamespace(namespaceName).create(saToCreate);

        MessageHelper.copyHeaders(exchange.getIn(), exchange.getOut(), true);
        exchange.getOut().setBody(sa);
    }

    protected void doDeleteServiceAccount(Exchange exchange, String operation) throws Exception {
        String saName = exchange.getIn().getHeader(KubernetesConstants.KUBERNETES_SERVICE_ACCOUNT_NAME, String.class);
        String namespaceName = exchange.getIn().getHeader(KubernetesConstants.KUBERNETES_NAMESPACE_NAME, String.class);
        if (ObjectHelper.isEmpty(saName)) {
            LOG.error("Delete a specific Service Account require specify a Service Account name");
            throw new IllegalArgumentException("Delete a specific Service Account require specify a Service Account name");
        }
        if (ObjectHelper.isEmpty(namespaceName)) {
            LOG.error("Delete a specific Service Account require specify a namespace name");
            throw new IllegalArgumentException("Delete a specific Service Account require specify a namespace name");
        }
        boolean saDeleted = getEndpoint().getKubernetesClient().serviceAccounts().inNamespace(namespaceName).withName(saName).delete();

        MessageHelper.copyHeaders(exchange.getIn(), exchange.getOut(), true);
        exchange.getOut().setBody(saDeleted);
    }
}