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/*
* Copyright (C) 2024, Thomas Wolf <twolf@apache.org> and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0 which is available at
* https://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.eclipse.jgit.internal.signing.ssh;
import org.eclipse.jgit.signing.ssh.CachingSigningKeyDatabase;
import org.eclipse.jgit.signing.ssh.SigningKeyDatabase;
/**
* A global {@link SigningKeyDatabase} instance.
*/
public final class SigningDatabase {
private static SigningKeyDatabase INSTANCE = new OpenSshSigningKeyDatabase();
private SigningDatabase() {
// No instantiation
}
/**
* Obtains the current instance.
*
* @return the global {@link SigningKeyDatabase}
*/
public static synchronized SigningKeyDatabase getInstance() {
return INSTANCE;
}
/**
* Sets the global {@link SigningKeyDatabase}.
*
* @param database
* to set; if {@code null} a default database using the OpenSSH
* allowed signers file and the OpenSSH revocation list mechanism
* is used.
* @return the previously set {@link SigningKeyDatabase}
*/
public static synchronized SigningKeyDatabase setInstance(
SigningKeyDatabase database) {
SigningKeyDatabase previous = INSTANCE;
if (database != INSTANCE) {
if (INSTANCE instanceof CachingSigningKeyDatabase caching) {
caching.clearCache();
}
if (database == null) {
INSTANCE = new OpenSshSigningKeyDatabase();
} else {
INSTANCE = database;
}
}
return previous;
}
}
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