BeanSharedStatePolicy.java

/*
 * Copyright 2014 JBoss Inc
 *
 * Licensed 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 io.apiman.gateway.test.policies;

import io.apiman.gateway.engine.async.IAsyncResult;
import io.apiman.gateway.engine.async.IAsyncResultHandler;
import io.apiman.gateway.engine.beans.PolicyFailure;
import io.apiman.gateway.engine.beans.PolicyFailureType;
import io.apiman.gateway.engine.beans.ApiRequest;
import io.apiman.gateway.engine.beans.ApiResponse;
import io.apiman.gateway.engine.components.ISharedStateComponent;
import io.apiman.gateway.engine.policy.IPolicy;
import io.apiman.gateway.engine.policy.IPolicyChain;
import io.apiman.gateway.engine.policy.IPolicyContext;
import io.apiman.gateway.test.policies.beans.DataBean;

/**
 * A policy used to test storing a bean in the shared state component.
 *
 * @author eric.wittmann@redhat.com
 */
@SuppressWarnings({ "nls" })
public class BeanSharedStatePolicy implements IPolicy {
    
    /**
     * Constructor.
     */
    public BeanSharedStatePolicy() {
    }

    /**
     * @see io.apiman.gateway.engine.policy.IPolicy#parseConfiguration(java.lang.String)
     */
    @Override
    public Object parseConfiguration(String jsonConfiguration) {
        return new Object();
    }
    
    /**
     * @see io.apiman.gateway.engine.policy.IPolicy#apply(io.apiman.gateway.engine.beans.ApiRequest, io.apiman.gateway.engine.policy.IPolicyContext, java.lang.Object, io.apiman.gateway.engine.policy.IPolicyChain)
     */
    @Override
    public void apply(final ApiRequest request, final IPolicyContext context, final Object config,
            final IPolicyChain<ApiRequest> chain) {
        final ISharedStateComponent sharedState = context.getComponent(ISharedStateComponent.class);
        final String namespace = "urn:" + getClass().getName();
        final String propName = "bean-property";
        DataBean db = new DataBean();
        db.setProperty1("my-value");
        db.setProperty2(true);
        db.setProperty3(42);
        sharedState.setProperty(namespace, propName, db, new IAsyncResultHandler<Void>() {
            @Override
            public void handle(IAsyncResult<Void> result) {
                chain.doApply(request);
            }
        });
    }

    /**
     * @see io.apiman.gateway.engine.policy.IPolicy#apply(io.apiman.gateway.engine.beans.ApiResponse, io.apiman.gateway.engine.policy.IPolicyContext, java.lang.Object, io.apiman.gateway.engine.policy.IPolicyChain)
     */
    @Override
    public void apply(final ApiResponse response, IPolicyContext context, Object config,
            final IPolicyChain<ApiResponse> chain) {
        final ISharedStateComponent sharedState = context.getComponent(ISharedStateComponent.class);
        final String namespace = "urn:" + getClass().getName();
        final String propName = "bean-property";
        final DataBean notfound = new DataBean();
        sharedState.getProperty(namespace, propName, notfound, new IAsyncResultHandler<DataBean>() {
            @Override
            public void handle(IAsyncResult<DataBean> result) {
                DataBean value = result.getResult();
                if (value == notfound) {
                    PolicyFailure failure = new PolicyFailure(PolicyFailureType.NotFound, 0, "DataBean not found.");
                    chain.doFailure(failure);
                } else {
                    response.getHeaders().put("X-Property-1", value.getProperty1());
                    response.getHeaders().put("X-Property-2", String.valueOf(value.isProperty2()));
                    response.getHeaders().put("X-Property-3", String.valueOf(value.getProperty3()));
                    chain.doApply(response);
                }
            }
        });
    }

}