Transient Fields

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Transient Fields

This is the manual for older MicroStream versions (Version < 5.0).
The new documentation (Version >= 5.0) is located at:
​https://docs.microstream.one/​
The default MicroStream implementation fully supports the Java transient field modifier. Class members marked transient will not be persisted.
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public class User 
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{
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	private String username;
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	//do not persist the users password
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	private transient String password; 
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}
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It is possible to override the default behavior by implementing  a custom PersistenceFieldEvaluator.
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PersistenceFieldEvaluator fieldEvaluator = 
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	(clazz, field) -> !field.getName().startsWith("_");
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EmbeddedStorageManager storage = EmbeddedStorage.Foundation()
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	.onConnectionFoundation(
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		c -> c.setFieldEvaluatorPersistable(fieldEvaluator)
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	)
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	.createEmbeddedStorageManager()
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	.start();
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Lazy and Eager Storing

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