Examples of org.apache.http.impl.client.ClientParamsStack

org.apache.http.impl.client.ClientParamsStack
Represents a stack of parameter collections. When retrieving a parameter, the stack is searched in a fixed order and the first match returned. Setting parameters via the stack is not supported. To minimize overhead, the stack has a fixed size and does not maintain an internal array. The supported stack entries, sorted by increasing priority, are:
1. Application parameters: expected to be the same for all clients used by an application. These provide "global", that is application-wide, defaults.
2. Client parameters: specific to an instance of {@link org.apache.http.client.HttpClient HttpClient}. These provide client specific defaults.
3. Request parameters: specific to a single request execution. For overriding client and global defaults.
4. Override parameters: specific to an instance of {@link org.apache.http.client.HttpClient HttpClient}. These can be used to set parameters that cannot be overridden on a per-request basis.
Each stack entry may be null. That is preferable over an empty params collection, since it avoids searching the empty collection when looking up parameters. @author Roland Weber @version $Revision: 691587 $


    public synchronized void start() {
        try {
            HttpHost target = this.requestProducer.getTarget();
            HttpRequest request = this.requestProducer.generateRequest();
            this.params = new ClientParamsStack(null, this.clientParams, request.getParams(), null);
            RequestWrapper wrapper = wrapRequest(request);
            wrapper.setParams(this.params);
            HttpRoute route = determineRoute(target, wrapper, this.localContext);
            this.mainRequest = new RoutedRequest(wrapper, route);
            requestConnection();

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                        cancel();
                    }


                });
            }
            this.params = new ClientParamsStack(null, this.clientParams, request.getParams(), null);
            final RequestWrapper wrapper = wrapRequest(request);
            wrapper.setParams(this.params);
            final HttpRoute route = determineRoute(target, wrapper, this.localContext);
            this.mainRequest = new RoutedRequest(wrapper, route);
            final RequestConfig config = ParamConfig.getRequestConfig(params);

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                        cancel();
                    }


                });
            }
            this.params = new ClientParamsStack(null, this.clientParams, request.getParams(), null);
            RequestWrapper wrapper = wrapRequest(request);
            wrapper.setParams(this.params);
            HttpRoute route = determineRoute(target, wrapper, this.localContext);
            this.mainRequest = new RoutedRequest(wrapper, route);
            this.requestContentProduced = false;

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        ConnRouteParams.setDefaultProxy(daddy, TARGET1);
        ConnRouteParams.setDefaultProxy(child, ConnRouteParams.NO_HOST);


        HttpParams hierarchy =
            new ClientParamsStack(null, daddy, child, null);
        Assert.assertNull("1", ConnRouteParams.getDefaultProxy(hierarchy));


        hierarchy = new ClientParamsStack
            (null,
             daddy,
             new ClientParamsStack(null, child, dummy, null),
             null);
        Assert.assertNull("2", ConnRouteParams.getDefaultProxy(hierarchy));


        hierarchy = new ClientParamsStack
            (null, daddy, new DefaultedHttpParams(child, dummy), null);
        Assert.assertNull("3", ConnRouteParams.getDefaultProxy(hierarchy));


        hierarchy = new DefaultedHttpParams(child, daddy);
        Assert.assertNull("4", ConnRouteParams.getDefaultProxy(hierarchy));

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        HttpRouteParams.setDefaultProxy(daddy, TARGET1);
        HttpRouteParams.setDefaultProxy(child, HttpRouteParams.NO_HOST);


        HttpParams hierarchy =
            new ClientParamsStack(null, daddy, child, null);
        assertNull("1", HttpRouteParams.getDefaultProxy(hierarchy));


        hierarchy = new ClientParamsStack
            (null,
             daddy,
             new ClientParamsStack(null, child, dummy, null),
             null);
        assertNull("2", HttpRouteParams.getDefaultProxy(hierarchy));


        hierarchy = new ClientParamsStack
            (null, daddy, new DefaultedHttpParams(child, dummy), null);
        assertNull("3", HttpRouteParams.getDefaultProxy(hierarchy));


        hierarchy = new DefaultedHttpParams(child, daddy);
        assertNull("4", HttpRouteParams.getDefaultProxy(hierarchy));

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        ConnRouteParams.setDefaultProxy(daddy, TARGET1);
        ConnRouteParams.setDefaultProxy(child, ConnRouteParams.NO_HOST);


        HttpParams hierarchy =
            new ClientParamsStack(null, daddy, child, null);
        assertNull("1", ConnRouteParams.getDefaultProxy(hierarchy));


        hierarchy = new ClientParamsStack
            (null,
             daddy,
             new ClientParamsStack(null, child, dummy, null),
             null);
        assertNull("2", ConnRouteParams.getDefaultProxy(hierarchy));


        hierarchy = new ClientParamsStack
            (null, daddy, new DefaultedHttpParams(child, dummy), null);
        assertNull("3", ConnRouteParams.getDefaultProxy(hierarchy));


        hierarchy = new DefaultedHttpParams(child, daddy);
        assertNull("4", ConnRouteParams.getDefaultProxy(hierarchy));

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