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Add interface for DB tasks will nullable results.

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This commit is contained in:
akwizgran
2018-11-12 12:13:26 +00:00
parent b24914408d
commit ecb63d1acb
6 changed files with 38 additions and 14 deletions
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2
bramble-api/src/main/java/org/briarproject/bramble/api/db/DatabaseComponent.java
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@@ -95,7 +95,7 @@ public interface DatabaseComponent {
*/
@Nullable
<R, E extends Exception> R transactionWithNullableResult(boolean readOnly,
DbCallable<R, E> task) throws DbException, E;
NullableDbCallable<R, E> task) throws DbException, E;
/**
* Stores a contact associated with the given local and remote pseudonyms,

3
bramble-api/src/main/java/org/briarproject/bramble/api/db/DbCallable.java
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@@ -2,11 +2,8 @@ package org.briarproject.bramble.api.db;
import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
import javax.annotation.Nullable;
@NotNullByDefault
public interface DbCallable<R, E extends Exception> {
@Nullable
R call(Transaction txn) throws DbException, E;
}

12
bramble-api/src/main/java/org/briarproject/bramble/api/db/NullableDbCallable.java Normal file
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@@ -0,0 +1,12 @@
package org.briarproject.bramble.api.db;
import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
import javax.annotation.Nullable;
@NotNullByDefault
public interface NullableDbCallable<R, E extends Exception> {
@Nullable
R call(Transaction txn) throws DbException, E;
}