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Use interface 'AssertOpen' instead of Runnable to assert transaction …
…is open This makes the 'assertOpen' more explicit by avoiding the indirection of a runnable.
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community/kernel/src/main/java/org/neo4j/kernel/api/AssertOpen.java
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/* | |||
* Copyright (c) 2002-2017 "Neo Technology," | |||
* Network Engine for Objects in Lund AB [http://neotechnology.com] | |||
* | |||
* This file is part of Neo4j. | |||
* | |||
* Neo4j is free software: you can redistribute it and/or modify | |||
* it under the terms of the GNU General Public License as published by | |||
* the Free Software Foundation, either version 3 of the License, or | |||
* (at your option) any later version. | |||
* | |||
* This program is distributed in the hope that it will be useful, | |||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | |||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |||
* GNU General Public License for more details. | |||
* | |||
* You should have received a copy of the GNU General Public License | |||
* along with this program. If not, see <http://www.gnu.org/licenses/>. | |||
*/ | |||
package org.neo4j.kernel.api; | |||
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/** | |||
* Used to verify that some source of operation is still open when operation is performed. | |||
* E.g. verify that transaction is still open when lazily reading property values from store. | |||
*/ | |||
public interface AssertOpen | |||
{ | |||
/** | |||
* Assert that source tied to instance is open. | |||
* Should throw exception with reason if source is not open. | |||
*/ | |||
void assertOpen(); | |||
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AssertOpen ALWAYS_OPEN = AlwaysOpen.INSTANCE; | |||
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enum AlwaysOpen implements AssertOpen | |||
{ | |||
INSTANCE | |||
{ | |||
@Override | |||
public void assertOpen() | |||
{ // no-op | |||
} | |||
} | |||
} | |||
} |
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