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Official Cloudant client for Java
/*
* Copyright © 2016, 2018 IBM Corp. 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.cloudant.tests;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
import com.cloudant.client.api.ClientBuilder;
import com.cloudant.client.api.CloudantClient;
import com.cloudant.http.Http;
import com.cloudant.http.HttpConnection;
import com.cloudant.tests.extensions.MockWebServerExtension;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.RegisterExtension;
import mockit.Expectations;
import mockit.Mocked;
import okhttp3.mockwebserver.Dispatcher;
import okhttp3.mockwebserver.MockResponse;
import okhttp3.mockwebserver.MockWebServer;
import okhttp3.mockwebserver.RecordedRequest;
import java.io.ByteArrayInputStream;
import java.net.URL;
import java.security.Security;
import java.security.SecurityPermission;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.LogManager;
import java.util.logging.LogRecord;
import java.util.logging.Logger;
import java.util.regex.Pattern;
public class LoggingTest {
private static final String logPrefixPattern = "[0-9,a-f]+-\\d+ ";
@RegisterExtension
public static MockWebServerExtension mockWebServerExt = new MockWebServerExtension();
public static MockWebServer mockWebServer;
private static CloudantClient client;
private volatile Logger logger;
private VerificationLogHandler handler;
@BeforeEach
public void setupMockWebServer() throws Exception {
mockWebServer = mockWebServerExt.get();
// Set a dispatcher that always returns 200 OK
mockWebServer.setDispatcher(new Dispatcher() {
@Override
public MockResponse dispatch(RecordedRequest request) throws InterruptedException {
return new MockResponse();
}
});
client = CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer)
.build();
}
@BeforeEach
public void createHandler() {
handler = new VerificationLogHandler();
}
@AfterEach
public void teardown() throws Exception {
// Remove the handler from the logger
logger.removeHandler(handler);
// Reload whatever log configuration existed before the test
LogManager.getLogManager().readConfiguration();
}
@Test
public void httpLoggingEnabled() throws Exception {
logger = setupLogger(HttpConnection.class, Level.ALL);
client.executeRequest(Http.GET(client.getBaseUri())).responseAsString();
assertTrue(handler.logEntries.size() > 0, "There should be at least 1 log entry");
}
@Test
public void urlRegexLogging() throws Exception {
//Set the regex filter property on the LogManager and assert it was set
String urlFilterPropName = "com.cloudant.http.filter.url";
String urlFilterPropValue = ".*/testdb.*";
setAndAssertLogProperty(urlFilterPropName, urlFilterPropValue);
// Configure HttpConnection logging and get a client
logger = setupLogger(HttpConnection.class, Level.FINE);
// Make a request to testdb
client.executeRequest(Http.GET(new URL(client.getBaseUri().toString() + "/testdb")))
.responseAsString();
// Check there were two log messages one for request and one for response
assertEquals(2, handler.logEntries.size(), "There should be 2 log messages");
// Check the messages were the ones we expected
assertHttpMessage("GET .*/testdb request", 0);
assertHttpMessage("GET .*/testdb response 200 OK", 1);
// Store the current log size
int logsize = handler.logEntries.size();
// Make a second request to a different URL and check that nothing else was logged
client.executeRequest(Http.GET(client.getBaseUri())).responseAsString();
assertEquals(logsize, handler.logEntries.size(), "There should have been no more log " +
"entries");
}
private String methodFilterPropName = "com.cloudant.http.filter.method";
@Test
public void httpMethodFilterLogging() throws Exception {
setAndAssertLogProperty(methodFilterPropName, "GET");
logger = setupLogger(HttpConnection.class, Level.FINE);
// Make a GET request
client.executeRequest(Http.GET(client.getBaseUri())).responseAsString();
// Check there were two log messages one for request and one for response
assertEquals(2, handler.logEntries.size(), "There should be 2 log messages");
// Check the messages were the ones we expected
assertHttpMessage("GET .* request", 0);
assertHttpMessage("GET .* response 200 OK", 1);
// Store the current log size
int logsize = handler.logEntries.size();
// Make a PUT request to a different URL and check that nothing else was logged
client.executeRequest(Http.PUT(client.getBaseUri(), "text/plain").setRequestBody(""))
.responseAsString();
assertEquals(logsize, handler.logEntries.size(), "There should have been no more log " +
"entries");
}
@Test
public void httpMethodFilterLoggingList() throws Exception {
setAndAssertLogProperty(methodFilterPropName, "PUT,GET");
logger = setupLogger(HttpConnection.class, Level.FINE);
// Make a GET request
client.executeRequest(Http.GET(client.getBaseUri())).responseAsString();
// Check there were two log messages one for request and one for response
assertEquals(2, handler.logEntries.size(), "There should be 2 log messages");
// Check the messages were the ones we expected
assertHttpMessage("GET .* request", 0);
assertHttpMessage("GET .* response 200 OK", 1);
// Make a PUT request to a different URL and check that new messages are logged
client.executeRequest(Http.PUT(client.getBaseUri(), "text/plain").setRequestBody(""))
.responseAsString();
assertEquals(4, handler.logEntries.size(), "There should now be 4 log messages");
// Check the messages were the ones we expected
assertHttpMessage("PUT .* request", 2);
assertHttpMessage("PUT .* response 200 OK", 3);
}
@Test
public void clientBuilderLogging() throws Exception {
logger = setupLogger(ClientBuilder.class, Level.CONFIG);
CloudantClientHelper.newMockWebServerClientBuilder(mockWebServer).build();
assertEquals(5, handler.logEntries.size(), "There should be 5 log entries");
// Validate each of the 5 entries are what we expect
assertLogMessage("URL: .*", 0);
assertLogMessage("Building client using URL: .*", 1);
assertLogMessage("Connect timeout: .*", 2);
assertLogMessage("Read timeout: .*", 3);
assertLogMessage("Using default GSON builder", 4);
}
/**
* A basic DNS log test that can be called with different values.
*
* @param cacheValue the value to set for the cache lifetime
* @throws Exception if the test fails or errors
*/
private void basicDnsLogTest(String cacheValue) throws Exception {
logger = setupLogger(ClientBuilder.class, Level.WARNING);
String previous = Security.getProperty("networkaddress.cache.ttl");
try {
Security.setProperty("networkaddress.cache.ttl", cacheValue);
CloudantClientHelper.getClientBuilder().build();
} finally {
// No way to unset a property, just reset to previous value
// or set to 30 if it was null
Security.setProperty("networkaddress.cache.ttl", (previous == null) ? "30" : previous);
}
}
/**
* Test that no warning is logged if the DNS lifetime is less than 30 s
*
* @throws Exception
*/
@Test
public void dnsNoWarningLessThan30() throws Exception {
basicDnsLogTest("29");
// Assert no warning was received
assertEquals(0, handler.logEntries.size(), "There should be no log entry");
}
/**
* Test that no warning is logged if DNS caching is disabled
*
* @throws Exception
*/
@Test
public void dnsNoWarning0() throws Exception {
basicDnsLogTest("0");
// Assert no warning was received
assertEquals(0, handler.logEntries.size(), "There should be no log entry");
}
/**
* Test that a warning is logged if DNS caching is set to cache forever
*
* @throws Exception
*/
@Test
public void dnsWarningForever() throws Exception {
basicDnsLogTest("-1");
// Assert a warning was received
assertEquals(1, handler.logEntries.size(), "There should be 1 log entry");
// Assert that it matches the expected pattern
assertLogMessage("DNS cache lifetime may be too long\\. .*", 0);
}
/**
* Test that no warning is logged if the DNS lifetime is 30 s
*
* @throws Exception
*/
@Test
public void dnsNoWarning30() throws Exception {
basicDnsLogTest("30");
// Assert no warning was received
assertEquals(0, handler.logEntries.size(), "There should be no log entry");
}
/**
* Test that a warning is logged if the DNS lifetime is longer than 30 s
*
* @throws Exception
*/
@Test
public void dnsWarning31() throws Exception {
basicDnsLogTest("31");
// Assert a warning was received
assertEquals(1, handler.logEntries.size(), "There should be 1 log entry");
// Assert that it matches the expected pattern
assertLogMessage("DNS cache lifetime may be too long\\. .*", 0);
}
/**
* Test that a warning is logged if the DNS lifetime cannot be checked because of security
* permissions.
*
* @throws Exception
*/
@Test
public void dnsWarningPermissionDenied(@Mocked final SecurityManager mockSecurityManager)
throws Exception {
// Record the mock expectations
new Expectations() {
{
mockSecurityManager.checkPermission(new SecurityPermission("getProperty" +
".networkaddress.cache.ttl"));
result = new SecurityException("Test exception to deny property access.");
times = 1;
}
};
logger = setupLogger(ClientBuilder.class, Level.WARNING);
try {
System.setSecurityManager(mockSecurityManager);
CloudantClientHelper.getClientBuilder().build();
} finally {
// Unset the mock security manager
System.setSecurityManager(null);
}
// Assert a warning was received
assertEquals(1, handler.logEntries.size(), "There should be 1 log entry");
// Assert that it matches the expected pattern
assertLogMessage("Permission denied to check Java DNS cache TTL\\. .*", 0);
}
/**
* Test that a warning is logged if a security manager is in use and the DNS cache lifetime
* property is unset.
*
* @throws Exception
*/
@Test
public void dnsWarningDefaultWithSecurityManager(@Mocked final SecurityManager
mockSecurityManager) throws Exception {
// Record the mock expectations
new Expectations() {
{
mockSecurityManager.checkPermission(new SecurityPermission("getProperty" +
".networkaddress.cache.ttl"));
minTimes = 2; // Once to set, once to get, and once to reset
maxTimes = 3; // Possible third call to reset the value, depending on test ordering
}
};
try {
System.setSecurityManager(mockSecurityManager);
// We can't set null as a value and there are no APIs for clearing a value. Another test
// may already have changed the value so we just set it to something invalid "a" to get
// a default value.
basicDnsLogTest("a");
} finally {
// Unset the mock security manager
System.setSecurityManager(null);
}
// Assert a warning was received
assertEquals(1, handler.logEntries.size(), "There should be 1 log entry");
// Assert that it matches the expected pattern
assertLogMessage("DNS cache lifetime may be too long\\. .*", 0);
}
/**
* Set a LogManager configuration property and assert it was set correctly
*/
private void setAndAssertLogProperty(String name, String value) throws Exception {
LogManager.getLogManager().readConfiguration(new ByteArrayInputStream((name
+ "=" + value).getBytes()));
assertEquals(value, LogManager.getLogManager().getProperty(name), "The log property " +
"should be the test value");
}
/**
* Assert a HTTP log message matches the prefix pattern plus a suffix
*
* @param pattern the regex pattern to check the message matches
* @param index the index of the message in the handler list
*/
private void assertLogMessage(String pattern, int index) {
Pattern p = Pattern.compile(pattern);
String msg = handler.logEntries.get(index).getMessage();
assertTrue(p.matcher(msg).matches(), "The log entry \"" + msg + "\" should match pattern " +
"" + pattern);
}
/**
* Assert a HTTP log message matches the prefix pattern plus a suffix
*
* @param logMsgSuffixPattern the suffix part of the pattern
* @param index the index of the message in the handler list
*/
private void assertHttpMessage(String logMsgSuffixPattern, int index) {
assertLogMessage(logPrefixPattern + logMsgSuffixPattern, index);
}
/**
* A java.util.logging.Handler that just adds log entries to a list in memory so they can be
* verified by the tests.
*/
private static final class VerificationLogHandler extends Handler {
public List logEntries = new ArrayList();
VerificationLogHandler() {
// Default to no logging
this.setLevel(Level.OFF);
}
@Override
public void publish(LogRecord record) {
logEntries.add(record);
}
@Override
public void flush() {
// No-op
}
@Override
public void close() throws SecurityException {
// No-op
}
}
/**
* A method to get and initialize a logger to test for a given class.
*
* @param classToLog the class we want a logger for
* @param level the logging level to enable
* @return the logger
* @throws Exception if something goes wrong
*/
private Logger setupLogger(Class classToLog, Level level) throws Exception {
String loggerName = classToLog.getName();
// Get the logger and assert non-null
Logger l = Logger.getLogger(loggerName);
// Add the verification handler
l.addHandler(handler);
// Set the logging level for the test
l.setLevel(level);
handler.setLevel(level);
return l;
}
}