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| package org.apache.tapestry.engine.state; |
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| import org.apache.tapestry.web.WebRequest; |
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| import org.apache.tapestry.web.WebSession; |
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| public class SessionScopeManager implements StateObjectPersistenceManager |
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| { |
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| private WebRequest _request; |
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| private String _applicationId; |
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| private String buildKey(String objectName)
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| { |
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| return "state:" + _applicationId + ":" + objectName;
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| } |
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| private WebSession getSession()
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| { |
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| return _request.getSession(true);
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| } |
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| public boolean exists(String objectName)
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| { |
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| WebSession session = _request.getSession(false);
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| if (session == null)
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| return false;
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| return session.getAttribute(buildKey(objectName)) != null;
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| } |
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| public Object get(String objectName, StateObjectFactory factory)
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| { |
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| String key = buildKey(objectName);
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| WebSession session = getSession();
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| Object result = session.getAttribute(key);
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| if (result == null)
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| { |
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| result = factory.createStateObject();
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| session.setAttribute(key, result);
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| } |
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| return result;
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| } |
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| public void store(String objectName, Object stateObject)
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| { |
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| String key = buildKey(objectName);
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| WebSession session = getSession();
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| session.setAttribute(key, stateObject);
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| } |
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| public void setApplicationId(String applicationName)
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| { |
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| _applicationId = applicationName;
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| } |
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| public void setRequest(WebRequest request)
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| { |
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| _request = request;
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| } |
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| } |