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12

ObjectDB is opening too many sockets

closed connection (File->Close connection) 22 sockets open 03_firstdb open second time 22 sockets open 04 ... created during socket creation. Those are created with 2 seconds interval ... and nothing prevents the JVM from removing them. Actually it seems that during these 4-5 seconds the JVM
2

find(entityClass, primaryKey, lockMode, properties)

the second argument is not a valid type for that entity's primary key or is null
2

find(entityClass, primaryKey, properties)

the second argument is is not a valid type for that entity’s primary key or is null Since: JPA 2.0
2

setHint(hintName, value)

for the property or hint Returns: the same query instance Throws: IllegalArgumentException - if the second
2

lessThanOrEqualTo(x, y)

Method javax.persistence.criteria.CriteriaBuilder Predicate lessThanOrEqualTo( Expression<?> x, Y y ) Create a predicate for testing whether the first argument is less than or equal to the second. Parameters: x - expression y - value Returns: less-than-or-equal predicate Since: JPA 2.0
2

lessThanOrEqualTo(x, y)

Method javax.persistence.criteria.CriteriaBuilder Predicate lessThanOrEqualTo( Expression<T> x, Expression<T> y ) Create a predicate for testing whether the first argument is less than or equal to the second. Parameters: x - expression y - expression Returns: less-than-or-equal predicate Since: JPA 2.0
2

lessThanOrEqualTo(x, y)

Method javax.persistence.criteria.CriteriaBuilder Predicate lessThanOrEqualTo( Expression<?> x, Expression<?> y ) Create a predicate for testing whether the first argument is less than or equal to the second. Parameters: x - expression y - expression Returns: less-than-or-equal predicate Since: JPA 2.0
2

lessThan(x, y)

Method javax.persistence.criteria.CriteriaBuilder Predicate lessThan( Expression<?> x, Expression<?> y ) Create a predicate for testing whether the first argument is less than the second. Parameters: x - expression y - expression Returns: less-than predicate Since: JPA 2.0
0

execute(p1, p2)

Method javax.jdo.Query Object execute( Object p1, Object p2 ) Execute the query and return the filtered Collection. Parameters: p1 - the value of the first parameter declared. p2 - the value of the second parameter declared. Returns: the filtered Collection. Since: JDO 1.0 See Also: executeWithArray(Object[] parameters)
0

execute(p1, p2, p3)

Method javax.jdo.Query Object execute( Object p1, Object p2, Object p3 ) Execute the query and return the filtered Collection. Parameters: p1 - the value of the first parameter declared. p2 - the value of the second parameter declared. p3 - the value of the third parameter declared. Returns

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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