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package org.apache.camel.spring.spi; |
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import org.apache.camel.Processor; |
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import org.apache.camel.RuntimeCamelException; |
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import org.apache.camel.Exchange; |
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import org.apache.camel.processor.DelegateProcessor; |
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import org.apache.camel.spi.Policy; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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import org.springframework.transaction.TransactionDefinition; |
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import org.springframework.transaction.TransactionStatus; |
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import org.springframework.transaction.support.TransactionCallbackWithoutResult; |
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import org.springframework.transaction.support.TransactionTemplate; |
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public class SpringTransactionPolicy<E> implements Policy<E> { |
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private static final transient Log log = LogFactory.getLog(SpringTransactionPolicy.class); |
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private TransactionTemplate template; |
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public SpringTransactionPolicy() { |
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} |
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public SpringTransactionPolicy(TransactionTemplate template) { |
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this.template = template; |
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} |
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public Processor wrap(Processor processor) { |
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final TransactionTemplate transactionTemplate = getTemplate(); |
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if (transactionTemplate == null) { |
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log.warn("No TransactionTemplate available so transactions will not be enabled!"); |
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return processor; |
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} |
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return new DelegateProcessor(processor) { |
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public void process(final Exchange exchange) { |
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transactionTemplate.execute(new TransactionCallbackWithoutResult() { |
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protected void doInTransactionWithoutResult(TransactionStatus status) { |
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try { |
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processNext(exchange); |
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} catch (Exception e) { |
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throw new RuntimeCamelException(e); |
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} |
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} |
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}); |
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} |
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@Override |
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public String toString() { |
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return "SpringTransactionPolicy:"+propagationBehaviorToString(transactionTemplate.getPropagationBehavior())+"[" + getNext() + "]"; |
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} |
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private String propagationBehaviorToString(int propagationBehavior) { |
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switch( propagationBehavior ) { |
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case TransactionDefinition.PROPAGATION_MANDATORY: |
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return "PROPAGATION_MANDATORY"; |
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case TransactionDefinition.PROPAGATION_NESTED: |
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return "PROPAGATION_NESTED"; |
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case TransactionDefinition.PROPAGATION_NEVER: |
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return "PROPAGATION_NEVER"; |
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case TransactionDefinition.PROPAGATION_NOT_SUPPORTED: |
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return "PROPAGATION_NOT_SUPPORTED"; |
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case TransactionDefinition.PROPAGATION_REQUIRED: |
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return "PROPAGATION_REQUIRED"; |
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case TransactionDefinition.PROPAGATION_REQUIRES_NEW: |
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return "PROPAGATION_REQUIRES_NEW"; |
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case TransactionDefinition.PROPAGATION_SUPPORTS: |
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return "PROPAGATION_SUPPORTS"; |
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} |
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return "UNKOWN"; |
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} |
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}; |
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} |
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public TransactionTemplate getTemplate() { |
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return template; |
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} |
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public void setTemplate(TransactionTemplate template) { |
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this.template = template; |
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} |
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} |