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/
FixedTransportChannelProvider.java
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/
FixedTransportChannelProvider.java
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/*
* Copyright 2017 Google LLC
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.google.api.gax.rpc;
import com.google.api.core.BetaApi;
import com.google.api.core.InternalExtensionOnly;
import com.google.auth.Credentials;
import com.google.common.base.Preconditions;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.ExecutorService;
/** An instance of TransportChannelProvider that always provides the same TransportChannel. */
@InternalExtensionOnly
public class FixedTransportChannelProvider implements TransportChannelProvider {
private final TransportChannel transportChannel;
private FixedTransportChannelProvider(TransportChannel transportChannel) {
this.transportChannel = Preconditions.checkNotNull(transportChannel);
}
@Override
public boolean shouldAutoClose() {
return false;
}
@Override
public boolean needsExecutor() {
return false;
}
@Override
public FixedTransportChannelProvider withExecutor(ExecutorService executor) {
throw new UnsupportedOperationException(
"FixedTransportChannelProvider doesn't need an executor");
}
@Override
@BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
public boolean needsHeaders() {
return false;
}
@Override
@BetaApi("The surface for customizing headers is not stable yet and may change in the future.")
public FixedTransportChannelProvider withHeaders(Map<String, String> headers) {
throw new UnsupportedOperationException("FixedTransportChannelProvider doesn't need headers");
}
@Override
public boolean needsEndpoint() {
return false;
}
@Override
public TransportChannelProvider withEndpoint(String endpoint) {
throw new UnsupportedOperationException(
"FixedTransportChannelProvider doesn't need an endpoint");
}
@Override
@BetaApi("The surface for customizing pool size is not stable yet and may change in the future.")
public boolean acceptsPoolSize() {
return false;
}
@Override
@BetaApi("The surface for customizing pool size is not stable yet and may change in the future.")
public TransportChannelProvider withPoolSize(int size) {
throw new UnsupportedOperationException(
"FixedTransportChannelProvider doesn't allow pool size customization");
}
@Override
public TransportChannel getTransportChannel() throws IOException {
return transportChannel;
}
@Override
public String getTransportName() {
return transportChannel.getTransportName();
}
@Override
public boolean needsCredentials() {
return false;
}
@Override
public TransportChannelProvider withCredentials(Credentials credentials) {
throw new UnsupportedOperationException(
"FixedTransportChannelProvider doesn't need credentials");
}
/** Creates a FixedTransportChannelProvider. */
public static FixedTransportChannelProvider create(TransportChannel transportChannel) {
return new FixedTransportChannelProvider(transportChannel);
}
}