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/*
* Copyright 2020-2021 Flyte Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.flyte.jflyte.gcp;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.util.Objects;
import org.flyte.jflyte.api.Token;
import org.flyte.jflyte.api.TokenSource;
/** Implementation of {@link TokenSource} for Google Cloud. */
class GcpTokenSource implements TokenSource {
private final GoogleAuthHelper authHelper;
private final String targetAudience;
private Token token;
GcpTokenSource(GoogleAuthHelper auth, String targetAudience) {
this.authHelper = Objects.requireNonNull(auth, "auth");
this.targetAudience = Objects.requireNonNull(targetAudience, "targetAudience");
}
@Override
public synchronized Token token() {
try {
if (token == null) {
token = authHelper.getToken(targetAudience);
}
return token;
} catch (IOException e) {
throw new UncheckedIOException("Failed to generate token", e);
}
}
}