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// Copyright 2016 The Bazel Authors. All rights reserved.
//
// 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 com.google.devtools.build.lib.remote;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentMap;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpHead;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
/**
* A factory class for providing a {@link ConcurrentMap} object implemented by a REST service. The
* URL has to support PUT, GET, and HEAD operations
*/
public final class RestUrlCacheFactory {
public static ConcurrentMap<String, byte[]> create(RemoteOptions options) {
return new RestUrlCache(options.restCacheUrl);
}
private static class RestUrlCache implements ConcurrentMap<String, byte[]> {
final String baseUrl;
RestUrlCache(String baseUrl) {
this.baseUrl = baseUrl;
}
@Override
public boolean containsKey(Object key) {
try {
HttpClient client = new DefaultHttpClient();
HttpHead head = new HttpHead(baseUrl + "/" + key);
HttpResponse response = client.execute(head);
int statusCode = response.getStatusLine().getStatusCode();
return HttpStatus.SC_OK == statusCode;
} catch (IOException e) {
throw new RuntimeException(e);
}
}
@Override
public byte[] get(Object key) {
try {
HttpClient client = new DefaultHttpClient();
HttpGet get = new HttpGet(baseUrl + "/" + key);
HttpResponse response = client.execute(get);
int statusCode = response.getStatusLine().getStatusCode();
if (HttpStatus.SC_NOT_FOUND == statusCode) {
return null;
}
if (HttpStatus.SC_OK != statusCode) {
throw new RuntimeException("GET failed with status code " + statusCode);
}
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
HttpEntity entity = response.getEntity();
entity.writeTo(buffer);
buffer.flush();
EntityUtils.consume(entity);
return buffer.toByteArray();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
@Override
public byte[] put(String key, byte[] value) {
try {
HttpClient client = new DefaultHttpClient();
HttpPut put = new HttpPut(baseUrl + "/" + key);
put.setEntity(new ByteArrayEntity(value));
HttpResponse response = client.execute(put);
int statusCode = response.getStatusLine().getStatusCode();
if (HttpStatus.SC_OK != statusCode) {
throw new RuntimeException("PUT failed with status code " + statusCode);
}
} catch (IOException e) {
throw new RuntimeException(e);
}
return null;
}
//UnsupportedOperationExceptions from here down
@Override
public int size() {
throw new UnsupportedOperationException();
}
@Override
public boolean isEmpty() {
throw new UnsupportedOperationException();
}
@Override
public boolean containsValue(Object value) {
throw new UnsupportedOperationException();
}
@Override
public byte[] remove(Object key) {
throw new UnsupportedOperationException();
}
@Override
public void putAll(Map<? extends String, ? extends byte[]> m) {
throw new UnsupportedOperationException();
}
@Override
public void clear() {
throw new UnsupportedOperationException();
}
@Override
public Set<String> keySet() {
throw new UnsupportedOperationException();
}
@Override
public Collection<byte[]> values() {
throw new UnsupportedOperationException();
}
@Override
public Set<Entry<String, byte[]>> entrySet() {
throw new UnsupportedOperationException();
}
@Override
public byte[] putIfAbsent(String key, byte[] value) {
throw new UnsupportedOperationException();
}
@Override
public boolean remove(Object key, Object value) {
throw new UnsupportedOperationException();
}
@Override
public boolean replace(String key, byte[] oldValue, byte[] newValue) {
throw new UnsupportedOperationException();
}
@Override
public byte[] replace(String key, byte[] value) {
throw new UnsupportedOperationException();
}
}
}
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