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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.node.admin.configserver;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonProperty;
import org.apache.http.HttpVersion;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.entity.BasicHttpEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.message.BasicStatusLine;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.SocketTimeoutException;
import java.net.URI;
import java.nio.charset.StandardCharsets;
import java.time.Duration;
import java.util.List;
import static org.junit.jupiter.api.Assertions.*;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
/**
* Basic testing of retry logic.
*
* @author dybis
*/
public class ConfigServerApiImplTest {
private static final int FAIL_RETURN_CODE = 100000;
private static final int TIMEOUT_RETURN_CODE = 100001;
@JsonIgnoreProperties(ignoreUnknown = true)
public static class TestPojo {
@JsonProperty("foo")
String foo;
@JsonProperty("error-code")
Integer errorCode;
}
private final String uri1 = "http://host1:666";
private final String uri2 = "http://host2:666";
private final List<URI> configServers = List.of(URI.create(uri1), URI.create(uri2));
private final StringBuilder mockLog = new StringBuilder();
private ConfigServerApiImpl configServerApi;
private int mockReturnCode = 200;
@BeforeEach
public void initExecutor() throws IOException {
CloseableHttpClient httpMock = mock(CloseableHttpClient.class);
when(httpMock.execute(any())).thenAnswer(invocationOnMock -> {
HttpGet get = (HttpGet) invocationOnMock.getArguments()[0];
mockLog.append(get.getMethod()).append(" ").append(get.getURI()).append(" ");
switch (mockReturnCode) {
case FAIL_RETURN_CODE -> throw new RuntimeException("FAIL");
case TIMEOUT_RETURN_CODE -> throw new SocketTimeoutException("read timed out");
}
BasicStatusLine statusLine = new BasicStatusLine(HttpVersion.HTTP_1_1, mockReturnCode, null);
BasicHttpEntity entity = new BasicHttpEntity();
String returnMessage = "{\"foo\":\"bar\", \"no\":3, \"error-code\": " + mockReturnCode + "}";
InputStream stream = new ByteArrayInputStream(returnMessage.getBytes(StandardCharsets.UTF_8));
entity.setContent(stream);
CloseableHttpResponse response = mock(CloseableHttpResponse.class);
when(response.getEntity()).thenReturn(entity);
when(response.getStatusLine()).thenReturn(statusLine);
return response;
});
configServerApi = ConfigServerApiImpl.createForTestingWithClient(configServers, httpMock);
}
@Test
void testBasicParsingSingleServer() {
TestPojo answer = configServerApi.get("/path", TestPojo.class);
assertEquals(answer.foo, "bar");
assertLogStringContainsGETForAHost();
}
@Test
void testBasicFailure() {
assertThrows(HttpException.class, () -> {
// Server is returning 400, no retries.
mockReturnCode = 400;
TestPojo testPojo = configServerApi.get("/path", TestPojo.class);
assertEquals(testPojo.errorCode.intValue(), mockReturnCode);
assertLogStringContainsGETForAHost();
});
}
@Test
void testBasicSuccessWithNoRetries() {
// Server is returning 201, no retries.
mockReturnCode = 201;
TestPojo testPojo = configServerApi.get("/path", TestPojo.class);
assertEquals(testPojo.errorCode.intValue(), mockReturnCode);
assertLogStringContainsGETForAHost();
}
@Test
void testBasicSuccessWithCustomTimeouts() {
mockReturnCode = TIMEOUT_RETURN_CODE;
var params = new ConfigServerApi.Params<TestPojo>();
params.setConnectionTimeout(Duration.ofSeconds(3));
try {
configServerApi.get("/path", TestPojo.class, params);
fail();
} catch (ConnectionException e) {
assertNotNull(e.getCause());
assertEquals("read timed out", e.getCause().getMessage());
}
}
@Test
void testRetries() {
// Client is throwing exception, should be retries.
mockReturnCode = FAIL_RETURN_CODE;
try {
configServerApi.get("/path", TestPojo.class);
fail("Expected failure");
} catch (Exception e) {
// ignore
}
List<String> log = List.of(mockLog.toString().split(" "));
assertTrue(log.containsAll(List.of("GET http://host1:666/path", "GET http://host2:666/path")));
}
@Test
void testNoRetriesOnBadHttpResponseCode() {
// Client is throwing exception, should be retries.
mockReturnCode = 503;
try {
configServerApi.get("/path", TestPojo.class);
fail("Expected failure");
} catch (Exception e) {
// ignore
}
assertLogStringContainsGETForAHost();
}
@Test
void testForbidden() {
mockReturnCode = 403;
try {
configServerApi.get("/path", TestPojo.class);
fail("Expected exception");
} catch (HttpException.ForbiddenException e) {
// ignore
}
assertLogStringContainsGETForAHost();
}
@Test
void testNotFound() {
// Server is returning 404, special exception is thrown.
mockReturnCode = 404;
try {
configServerApi.get("/path", TestPojo.class);
fail("Expected exception");
} catch (HttpException.NotFoundException e) {
// ignore
}
assertLogStringContainsGETForAHost();
}
@Test
void testConflict() {
// Server is returning 409, no exception is thrown.
mockReturnCode = 409;
configServerApi.get("/path", TestPojo.class);
assertLogStringContainsGETForAHost();
}
private void assertLogStringContainsGETForAHost() {
String logString = mockLog.toString();
assertTrue((logString.equals("GET http://host1:666/path ") || logString.equals("GET http://host2:666/path ")),
"log does not contain expected entries:" + logString);
}
}
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