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package org.apache.tapestry.engine.state; |
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import org.apache.tapestry.SessionStoreOptimized; |
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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) 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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if (stateObject instanceof SessionStoreOptimized) |
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{ |
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SessionStoreOptimized optimized = (SessionStoreOptimized) stateObject; |
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if (!optimized.isStoreToSessionNeeded()) |
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return; |
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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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} |